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πŸ“œ Defensive Prior Art

Patent-grade invention disclosures for things that should exist but don't. Published to the public domain so nobody can lock them up.

Every technical claim is specific enough to constitute prior art under 35 U.S.C. Β§ 102. Every reference is real. New disclosure every day. Verified timestamps on GitHub β†’

Technical cross-section showing smartphones detecting ambient seismic vibrations through urban soil layers with HVSR analysis overlays and liquefaction susceptibility heat map
LITF-PA-2026-047 · Seismic Geotechnics / Crowdsourced Sensing

System and Method for Continuous Soil Liquefaction Susceptibility Mapping Using Crowdsourced Smartphone Accelerometer HVSR Analysis with Graph Neural Network Spatial Interpolation

A system that repurposes MEMS accelerometers in consumer smartphones to perform horizontal-to-vertical spectral ratio (HVSR) analysis of ambient seismic noise during periods of device stillness. On-device spectral processing extracts soil column resonance frequency (fβ‚€) and amplification (Aβ‚€), transmitting only a 560-byte summary packet to a cloud GNN that interpolates between sparse measurements using geological priors. The resulting 50-meter-resolution liquefaction susceptibility maps update continuously. During earthquakes, the same network provides real-time shaking data for liquefaction nowcasts within 30 seconds of shaking onset.

πŸ“… May 24, 2026 πŸ“ 12 claims πŸ“š 15 references
Technical illustration of mosquito wingbeat detection by distributed consumer IoT device microphones with spectral analysis overlays
LITF-PA-2026-046 · Computational Entomology / Distributed Sensing

System and Method for Real-Time Mosquito Population Density Estimation and Species-Level Classification Using Distributed Acoustic Wingbeat Frequency Analysis from Consumer IoT Device Microphone Networks

A system that repurposes the microphone arrays in consumer IoT devices β€” smart speakers, security cameras, video doorbells, smartphones β€” for real-time mosquito surveillance. An 18,000-parameter edge classifier detects species-specific wingbeat frequencies (150–900 Hz) in ambient audio, transmitting only 64-byte structured detection reports to a cloud fusion engine. Gaussian process regression over a hexagonal spatial grid aggregates thousands of device detections into calibrated population density maps and species distribution overlays, providing 100-meter spatial resolution and hourly temporal resolution without any dedicated entomological hardware.

πŸ“… May 23, 2026 πŸ“ 12 claims πŸ“š 17 references
Cross-section of indoor office showing CO2 concentration gradients and airborne pathogen distribution overlay
LITF-PA-2026-045 · Indoor Air Quality / Computational Epidemiology

System and Method for Real-Time Indoor Airborne Infection Risk Estimation Using Consumer CO2 Sensor Concentration Decay Kinetics and Occupancy-Normalized Rebreathed Air Fraction Modeling

A system that converts consumer CO2 sensor time-series data into calibrated airborne infection transmission probabilities. Automatic ventilation rate estimation via exponential decay fitting on post-vacancy CO2 segments replaces tracer gas testing. The Rudnick-Milton reformulation of Wells-Riley computes the rebreathed air fraction in real time, while a pathogen-specific quanta engine covers SARS-CoV-2, influenza, measles, TB, and RSV. Runs on the sensor's existing microcontroller in under 100 KB firmware, outputting a continuously updated infection risk index, ventilation adequacy score, and time-to-threshold alerts with no hardware beyond a single $15-179 NDIR CO2 sensor.

πŸ“… May 22, 2026 πŸ“ 10 claims πŸ“š 15 references
Dashcam view approaching a highway bridge with engineering deflection measurement overlay
LITF-PA-2026-044 · Structural Engineering / Computer Vision

System and Method for Non-Invasive Bridge Structural Health Assessment Using Traffic-Induced Deflection Analysis from Consumer Dashcam Video with Edge-Deployed Physics-Informed Load Rating Estimation

A system that estimates bridge structural condition and load-carrying capacity by measuring traffic-induced deflection from consumer dashcam video. Sub-pixel phase-based optical flow resolves 0.05–0.25 mm vertical deck displacement from a moving vehicle, while ego-motion compensation using IMU data and fixed abutment reference features isolates the bridge response. A physics-informed Euler-Bernoulli beam model fits the measured deflection influence line to estimate effective flexural rigidity, which is compared against design values from the National Bridge Inventory. Crowdsourced across fleet vehicles, 200–500 crossings achieve Β±5% EI precision per bridge at $0.02–0.05 per crossing β€” replacing $5,000–50,000 biennial visual inspections with continuous monitoring at zero sensor installation cost.

πŸ“… May 21, 2026 πŸ“ 11 claims πŸ“š 13 references
Cutaway cross-section of a residential wall assembly showing WiFi signal waves passing through dry and moisture-saturated zones with signal distortion visualized as color shifts
LITF-PA-2026-043 · Building Science / RF Sensing

System and Method for Detecting and Localizing Concealed Moisture Intrusion in Building Envelopes Using WiFi Channel State Information from Existing Indoor Wireless Access Point Infrastructure with Temporal Deep Learning and Dielectric Anomaly Mapping

A system that detects concealed water intrusion in walls, floors, and ceilings by analyzing WiFi channel state information from existing mesh access points. Water's relative permittivity (~78 at 2.4 GHz) dwarfs dry building materials (2–8), producing measurable changes in subcarrier amplitude, frequency-selective fading, and group delay as moisture accumulates. A temporal convolutional network trained on multi-scale CSI features distinguishes slow moisture signatures from human activity and thermal cycling, while multi-link dielectric tomography localizes the intrusion to specific wall sections β€” all at zero incremental hardware cost.

πŸ“… May 20, 2026 πŸ“ 12 claims πŸ“š 16 references
Cross-section view of a highway showing buried fiber optic cable beneath asphalt layers with vibration wave visualizations propagating from traffic down through the pavement structure to the sensing fiber
LITF-PA-2026-040 · Infrastructure / Distributed Fiber Sensing

System and Method for Continuous Non-Contact Assessment of Asphalt Pavement Structural Condition Using Traffic-Induced Vibration Transfer Function Analysis from Distributed Acoustic Sensing on Existing Telecommunications Fiber Optic Infrastructure with Recurrent Neural Network Degradation Modeling

A system that repurposes existing buried telecommunications fiber optic cables as distributed acoustic sensors to continuously monitor asphalt pavement structural condition. Traffic-induced vibrations propagate through pavement layers to the fiber, and the frequency-dependent vibration transfer function encodes layer stiffness, damping, bond condition, and moisture state. A CNN-LSTM model trained on paired DAS measurements and ground-truth pavement condition surveys (PCI, FWD, GPR) estimates current condition and predicts remaining useful life for every meter of road along the fiber route, enabling network-scale monitoring at zero incremental sensor cost.

Claims: 12 References: 17
Rooftop solar panel array with data visualization overlays showing per-panel production metrics and fault highlighting
LITF-PA-2026-039 · Solar / Edge Analytics

System and Method for Distributed Photovoltaic Array Fault Detection and Power Loss Attribution Using Inter-Inverter Production Correlation Analysis and Weather-Normalized Degradation Modeling

A system that detects, classifies, and quantifies faults in distributed photovoltaic installations by exploiting the statistical correlation structure of production telemetry across co-located microinverters. The system computes pairwise correlation coefficients and weather-normalized production ratios across all inverters within rolling time windows, classifying deviations into five fault categories (partial shading, soiling, cell degradation, connector resistance, inverter electronics degradation) based on each type's mathematically distinct signature in correlation-ratio feature space, then generates prioritized maintenance alerts with estimated energy loss and repair payback periods.

Claims: 10 References: 14
A forearm wearing an EMG wristband with glowing electrodes, hand interacting with a smartphone touchscreen, with data visualization overlays showing EMG waveforms and touch coordinate streams converging into a neural network diagram
LITF-PA-2026-038 · Wearable Computing / Electromyography

System and Method for Continuous Self-Calibration of Wearable Surface Electromyography Gesture Recognition Models Using Opportunistic Ground Truth Labels Derived from Concurrent Capacitive Touchscreen Input Events on Paired Devices

A system that continuously calibrates wearable sEMG gesture recognition models without explicit calibration sessions by exploiting concurrent touchscreen input events on Bluetooth-paired devices as opportunistic ground truth labels. Each touch event type (tap, swipe, pinch, keystroke) constrains the hand to a known biomechanical configuration, providing labeled sEMG training examples at a rate of 1,000–1,500 per day from natural phone usage. An on-device continual learning pipeline with elastic weight consolidation and experience replay incrementally adapts the gesture classifier to electrode shift, skin impedance drift, and cross-session variability, recovering to within 2% of peak accuracy within 45–90 minutes of natural use with zero user burden and no raw data leaving the device.

Claims: 12 References: 16
Cutaway view of a residential neighborhood showing an underground gas pipe leak with methane plume rising through soil into nearby homes containing glowing air quality monitors, with data streams flowing upward to a cloud heat map pinpointing the leak
LITF-PA-2026-037 · Gas Infrastructure / Distributed Sensing

System and Method for Distributed Detection and Geolocation of Underground Natural Gas Distribution Pipeline Micro-Leaks Using Spatiotemporal Correlation of Metal-Oxide Semiconductor Gas Sensor Readings from Crowdsourced Consumer Indoor Air Quality Monitor Networks with Inverse Gaussian Plume Dispersion Modeling

A system that detects and geolocates underground natural gas pipeline micro-leaks by exploiting the metal-oxide semiconductor (MOX) gas sensors in 15–25 million deployed consumer indoor air quality monitors. MOX sensors (Sensirion SGP40, Bosch BME680, ScioSense ENS160) exhibit cross-sensitivity to methane, ethane, and mercaptan odorant at concentrations produced by nearby distribution leaks (1–1,000 ppm indoor enhancement). A cloud platform aggregates anonymized VOC readings, applies Gaussian process baseline estimation and DBSCAN spatial clustering to identify correlated anomalies, excludes indoor sources via wind direction, barometric, and stack effect correlation tests, then geolocates the subsurface leak source using MCMC-sampled inverse Gaussian plume dispersion modeling coupled with soil gas transport, achieving 30–80 meter accuracy from 5+ devices over 72 hours at zero incremental hardware cost.

Claims: 13 References: 16
City bus with rooftop reference instruments passing a lamppost-mounted air quality sensor, with calibration data transfer visualized as flowing cyan lines between the two devices
LITF-PA-2026-036 · Environmental Monitoring / Sensor Networks

System and Method for Autonomous Calibration and Drift Correction of Distributed Low-Cost Air Quality Sensor Networks Using Mobile Reference Platforms on Public Transit Vehicles with Graph Attention Network Calibration Transfer

A system deploying reference-grade air quality instruments (BAM, UV photometric O3, CAPS NO2) on municipal transit bus rooftops to provide intermittent colocation calibration events for distributed low-cost sensor networks as buses traverse fixed routes covering 60–85% of the urban street grid. Per-sensor drift models (Kalman-filtered linear β†’ GBDT β†’ conditional neural process) are fit from accumulated colocation data, then a graph attention network with multi-head attention over spatial, meteorological, and land-use edge features propagates calibration corrections to off-route sensors via learned atmospheric correlation structure, reducing network-wide PM2.5 RMSE from 8–12 Β΅g/mΒ³ to <3 Β΅g/mΒ³ at 5–15% the cost of equivalent stationary reference monitor coverage.

Claims: 13 References: 15
Utility vehicle with sensor arrays scanning buried water pipes underground, showing color-coded pipe materials detected by electromagnetic induction
LITF-PA-2026-035 · Infrastructure / Water Utility

System and Method for Non-Invasive Classification of Buried Water Service Line Materials and Condition Assessment Using Vehicle-Mounted Multi-Frequency Electromagnetic Induction Arrays, Ground-Penetrating Radar, and Deep Learning Material Fingerprinting

A system deploying multi-frequency electromagnetic induction arrays (1 kHz–100 kHz, 24 data channels) and dual-frequency ground-penetrating radar on utility fleet vehicles to classify buried water service line materials (lead, copper, galvanized steel, ductile iron, PVC) by exploiting material-specific conductivity-permeability signatures: lead's low-frequency quadrature-to-in-phase crossover at 8–15 kHz, copper's higher conductivity shifting crossover below 5 kHz, ferromagnetic materials' permeability-dominated response, and plastic pipes' GPR-only dielectric reflection. A dual-branch CNN fuses EMI spectrograms and GPR radargrams for >92% material classification accuracy at driving speeds, enabling city-scale LCRR-compliant lead service line inventories at $12–18K per vehicle versus $500–3,000 per excavation.

Claims: 13 References: 15
Urban streetscape at dusk with acoustic sensor pods on buildings detecting an electrical arc flash on a distribution line, with sound wave visualizations propagating toward sensors
LITF-PA-2026-034 · Smart Grid / Acoustic Signal Processing

System and Method for Autonomous Detection and Classification of Overhead Electrical Distribution Fault Events Using Infrasound and Acoustic Signatures Captured by Existing Municipal Gunshot Detection Sensor Networks with Deep Learning Spectral Fingerprinting

A system that repurposes existing municipal gunshot detection acoustic sensor networks (20–25 wideband microphones per square mile, deployed in 170+ cities) to autonomously detect, classify, and geolocate overhead electrical distribution fault events, exploiting the distinctive acoustic signatures of arc faults (120 Hz amplitude modulation), conductor clashing (0.3–2 Hz periodicity), transformer explosions (2–20 Hz infrasound), and insulator flashover (8.33 ms power-frequency-locked double pulses), applying a deep CNN classifier on MFCC spectrograms with infrasound features and TDOA multilateration for 10–25 meter geolocation, enabling sub-minute fault alerts to utility SCADA systems at zero incremental hardware cost.

Claims: 12 References: 16
City intersection with traffic cameras overlaid with particulate matter heatmap visualization showing air quality gradients
LITF-PA-2026-033 · UrbanTech / Environmental Sensing

System and Method for Spatially-Resolved Atmospheric Particulate Matter Estimation Using Visible-Light Extinction Analysis from Existing Outdoor Camera Infrastructure with Neural Calibration Against Colocated Reference Monitors

A system that repurposes existing outdoor cameras (traffic, security, dashcam fleets) as hyperlocal PM2.5/PM10 sensors by analyzing visible-light extinction across reference targets at known distances, applying the Beer-Lambert-Bouguer law to compute spectral contrast attenuation, and calibrating via a CNN trained on synchronized imagery-monitor pairs, producing continuous 100-meter resolution urban air quality maps from the estimated 85 million outdoor cameras already deployed in the US at zero incremental hardware cost.

Claims: 12 References: 14
Aerial view of city streets with fleet vehicles showing temperature sensor readings and urban heat map overlay
LITF-PA-2026-032 · UrbanTech / Climate Science

System and Method for Continuous Urban Heat Island Microclimate Mapping Using Fleet Vehicle External Temperature Sensor Telemetry, Spatiotemporal Kriging, and Land Use Regression Covariates

A system that harvests ambient air temperature from the NTC thermistors already installed in connected fleet vehicles, applies a vehicle-specific bias correction model compensating for engine heat soak, solar loading, and radiator effects, fuses corrected observations with land use regression covariates (impervious surface fraction, NDVI, sky view factor, building density), and interpolates via spatiotemporal kriging with anisotropic MatΓ©rn covariance to produce continuous street-level urban heat island maps at 50–100 m resolution, enabling heat vulnerability alerts, cool corridor routing, and urban greening ROI estimation using millions of already-connected fleet vehicles.

Claims: 12 References: 16
Warehouse interior with BLE beacons showing thermal heatmap overlay from battery voltage inference
LITF-PA-2026-031 · IoT / Building Science

System and Method for Continuous Indoor Temperature Field Mapping Using Bluetooth Low Energy Beacon Battery Voltage Telemetry and Gaussian Process Spatial Interpolation

A system that infers ambient temperature from the battery voltage telemetry of existing BLE beacons, exploiting the electrochemical temperature coefficient of lithium coin cells (βˆ’0.3 to βˆ’0.5 mV/Β°C OCV, 200–400 mV IR-drop separation over 25Β°C under TX load) and applying Gaussian process regression with a MatΓ©rn 5/2 spatial kernel to produce continuous indoor thermal field maps with quantified uncertainty, enabling HVAC optimization, cold chain compliance, and building energy auditing at zero marginal hardware cost across billions of already-deployed beacons.

Claims: 12 References: 16
Residential electrical wiring cross-section with power line communication signals and neural network fault detection overlay
LITF-PA-2026-030 · Smart Home / Electrical Safety

System and Method for Predictive Residential Electrical Wiring Degradation Detection Using Power Line Communication Channel State Information from Consumer Broadband-over-Powerline Adapters and On-Premises Edge Inference

A system repurposing OFDM channel estimation data from consumer broadband-over-powerline adapters to continuously monitor residential wiring health, detecting loose connections, insulation carbonization, moisture ingress, and thermal degradation through channel frequency response drift analysis, with multi-node fault localization via channel impulse response triangulation and on-premises temporal convolutional network inference.

Claims: 12 References: 16
Person holding smartphone recording video of a dog walking with skeletal joint tracking overlay
LITF-PA-2026-029 · Veterinary AI / Consumer Health

System and Method for Automated Companion Animal Health Screening Using Smartphone Video-Based Gait Kinematics Analysis, Respiratory Rate Estimation, and Longitudinal Behavioral Anomaly Detection

A system using consumer smartphone video to perform markerless pose estimation on companion animals, extracting gait kinematics, respiratory rate, and body condition score from a single capture, with breed-specific normalization and longitudinal behavioral anomaly detection for early disease identification, all running on-device with federated learning for continuous improvement.

Claims: 10 References: 17
Maintenance technician holding smartphone near industrial rotating machinery with acoustic waveform analysis
LITF-PA-2026-028 · Industrial IoT / Predictive Maintenance

System and Method for Non-Contact Rotating Machinery Health Assessment Using Consumer Mobile Device Acoustic Emission Analysis and Cross-Domain Transfer Learning

A system using consumer smartphone microphones to capture acoustic emissions from rotating machinery, running on-device spectral decomposition and cross-domain transfer learning from vibration datasets to classify bearing faults, gear wear, and imbalance conditions, with federated learning for continuous improvement without transmitting raw audio off-device, and Weibull survival models for remaining useful life estimation.

Claims: 10 References: 16
Fleet vehicle with thermal infrared camera scanning urban road surface showing thermal inertia heatmap overlay
LITF-PA-2026-027 · Transportation Infrastructure / Thermal Sensing

System and Method for Predictive Remaining Useful Life Estimation of Asphalt Pavement Using Fleet-Vehicle-Mounted Thermal Infrared Imaging and Physics-Informed Thermal Inertia Inverse Modeling

A system that estimates remaining useful life of asphalt pavement at city scale using thermal inertia measurements from low-cost LWIR cameras on fleet vehicles, computing apparent thermal inertia via Bayesian inversion of a 1-D heat conduction model against multi-pass surface temperature observations, and predicting segment-level remaining useful life through a spatiotemporal convolutional neural network that detects subsurface degradation 12 to 24 months before visible distresses appear.

Claims: 10 References: 15
Suburban neighborhood with water distribution network overlay and pressure wave visualization from leak detection
LITF-PA-2026-026 · Smart Infrastructure / Water Distribution

System and Method for Municipal Water Distribution Network Leak Detection and Localization Using Crowdsourced Pressure Telemetry from Consumer Smart Water Meters and Physics-Informed Graph Neural Networks

A system that detects and localizes leaks in municipal water distribution mains by aggregating high-frequency pressure telemetry from networks of consumer-grade smart water meters, using time-difference-of-arrival analysis of pressure transients propagating through the pipe network and a physics-informed graph neural network whose topology mirrors the utility pipe infrastructure, with privacy-preserving differential pressure reporting that prevents inference of household usage patterns.

Claims: 10 References: 14
Residential gas meter with digital pressure sensor and holographic waveform overlays showing appliance identification
LITF-PA-2026-025 · Smart Home / Energy Monitoring

System and Method for Non-Intrusive Residential Natural Gas Appliance Load Disaggregation Using Meter-Point Pressure Waveform Transient Analysis and Edge-Deployed Source Separation Neural Networks

A system that identifies individual natural gas appliances and estimates per-appliance consumption from a single high-resolution pressure transducer at the gas meter, using valve-opening transient signatures including onset slope, ring-down reflection patterns, and steady-state pressure offsets processed through a convolutional source separation network that resolves overlapping multi-appliance activations and enforces global flow consistency against the total metered flow.

Claims: 10 References: 13
Overhead view of city street with municipal fleet vehicle under mixed-health tree canopy
LITF-PA-2026-024 · Urban Forestry / Remote Sensing

System and Method for Continuous Urban Tree Health Assessment and Predictive Mortality Mapping Using Opportunistic Multi-Pass Spectral Imaging from Municipal Fleet Vehicles and Spatiotemporal Graph Neural Networks

A system that continuously monitors the health of individual urban trees by mounting multispectral cameras (RGB + NIR) on municipal fleet vehicles such as refuse trucks and street sweepers, performing on-device canopy segmentation and spectral index computation, resolving tree identities across multiple vehicle passes, and predicting 6-month mortality risk via a spatiotemporal graph neural network that models spatial relationships between neighboring trees to detect correlated decline from pests, disease, or shared environmental stress.

Claims: 10 References: 13 Filed: 2026-04-29
Cross-section of residential sewer pipe with acoustic sensor detecting tree root intrusion
LITF-PA-2026-023 · Infrastructure / Acoustic Sensing

System and Method for Non-Invasive Sewer Lateral Condition Assessment and Predictive Blockage Detection Using Residential Fixture Drain Acoustic Emission Analysis and Edge-Deployed Spectral Neural Networks

A system that detects developing sewer line blockages and pipe deterioration by capturing acoustic emissions from ordinary residential drain events (toilet flushes, sink usage, shower flow) using a waterproof MEMS microphone at the building cleanout, extracting spectral features including pipe resonance splitting caused by partial obstructions, classifying seven condition states via an edge-deployed CNN, and tracking longitudinal spectral drift to predict time-to-blockage weeks before catastrophic failure.

Claims: 10 References: 13 Filed: 2026-04-28
Cutaway view of house foundation with radon gas rising through cracks and smart home sensors displaying pressure data
LITF-PA-2026-022 · Environmental Health / Smart Home

System and Method for Continuous Indoor Radon Concentration Estimation Without Dedicated Radon Sensors Using Smart Home Barometric Pressure Differential Time-Series, Soil Permeability Transport Models, and Edge-Deployed Physics-Informed Neural Networks

A system that estimates indoor radon concentration without dedicated radon detectors by analyzing barometric pressure differential time-series from existing smart home sensors (thermostats, weather stations, smartphones), computing foundation-level indoor-outdoor pressure differentials accounting for stack effect, wind depressurization, and HVAC mechanical depressurization, and processing these through a physics-informed neural network embedding the Nazaroff advective soil-gas transport equation conditioned on USGS soil radon potential maps, generating continuous radon risk alerts and preemptive ventilation recommendations.

Claims: 10 References: 13 Filed: 2026-04-27
Network of weather stations overlaid on terrain showing wildfire ember trajectory predictions
LITF-PA-2026-021 · Wildfire Detection / Environmental Sensing

System and Method for Early Wildfire Detection and Ember Transport Corridor Prediction Using Distributed Consumer Weather Station Microclimate Anomaly Fusion and Physics-Informed Neural Networks

A system that fuses barometric pressure microvariations, wind vectors, temperature anomalies, humidity drops, and particulate matter data from the existing network of consumer weather stations to detect wildfire ignition events via spatiotemporal graph neural networks and predict ember transport corridors using physics-informed neural networks embedding Rothermel fire spread and Albini ember lofting models, issuing geofenced alerts to residents in predicted ember landing zones 15–45 minutes before ember arrival.

Claims: 10 References: 16 Filed: 2026-04-26
House cross-section showing thermal insulation layers with smart thermostat displaying temperature response curves
LITF-PA-2026-020 · Building Science / Energy Efficiency

System and Method for Non-Invasive Continuous Building Envelope Thermal Performance Assessment Using Smart Thermostat Heating and Cooling Response Curve Analysis with Edge-Deployed Machine Learning

A system that continuously infers building envelope thermal resistance and infiltration parameters from heating and cooling response curves already recorded by commodity smart thermostats, cross-referenced with public weather API data, using a Bayesian state-space model to track degradation over months and years and generate actionable alerts for insulation failures, air seal defects, and moisture intrusion events without requiring any additional hardware, sensors, or site visits.

Claims: 10 References: 16 Filed: 2026-04-25
Smart water meter with pressure transient waveforms and fixture identification data overlays
LITF-PA-2026-019 · WaterTech / Smart Metering

System and Method for Non-Intrusive Residential Water End-Use Disaggregation and Anomalous Flow Detection Using Smart Meter Hydraulic Transient Fingerprinting, Blind Source Separation, and Self-Supervised Contrastive Learning

A system that disaggregates whole-house water consumption into per-fixture end-use categories using hydraulic pressure transient signatures captured by existing smart water meters, applies non-negative tensor factorization for blind source separation of concurrent fixture events, and trains a temporal convolutional network via self-supervised contrastive learning across a utility service territory without labeled data, enabling per-fixture water accounting and real-time leak detection at less than $15 incremental hardware cost per meter.

Claims: 10 References: 16 Filed: 2026-04-24
Vehicle tire on wet road surface with acoustic wave visualization and sensor data overlay
LITF-PA-2026-018 · Automotive / Road Safety

System and Method for Continuous Road Surface Friction Coefficient Estimation Using Crowdsourced Vehicle Tire-Road Acoustic Emission, Wheel Speed Sensor Micro-Slip Analysis, and Self-Supervised Contrastive Learning for Real-Time Friction Mapping

A system that fuses tire-road acoustic emission captured by existing vehicle cabin microphones with wheel speed sensor micro-slip ratios during normal driving, trains a friction estimation model via self-supervised contrastive learning using cross-vehicle consistency on shared road segments, and aggregates per-vehicle estimates into real-time spatiotemporal friction maps served to navigation and autonomous driving systems, requiring no new hardware on vehicles manufactured after 2020.

Claims: 10 References: 15 Filed: 2026-04-23
Residential street with pole-mounted distribution transformers and smart meters showing voltage harmonic analysis overlay
LITF-PA-2026-016 · EnergyTech / Grid Diagnostics

System and Method for Real-Time Distribution Transformer Incipient Fault Detection and Remaining Useful Life Estimation Using Smart Meter Voltage Harmonic Spectrum Analysis and Federated Graph Neural Networks

A system that detects incipient distribution transformer faults by analyzing voltage harmonic spectra from existing smart meters using a federated graph neural network that models the radial distribution network topology, distinguishing transformer-originated harmonics from load and feeder sources, enabling per-transformer remaining useful life estimation at zero marginal hardware cost via firmware updates to deployed AMI meters.

Claims: 10 References: 18 Filed: 2026-04-20
High-voltage transmission towers with ground-level magnetometer sensor pods beneath the right-of-way for real-time conductor sag estimation
LITF-PA-2026-015 · EnergyTech / Grid Infrastructure

System and Method for Real-Time Power Transmission Line Conductor Sag Estimation and Dynamic Line Rating Using Ground-Level Triaxial Magnetometer Arrays and Physics-Informed Recurrent Neural Networks

A system that deploys low-cost triaxial magnetometer arrays at ground level within transmission line rights-of-way, measures the 60 Hz magnetic field gradient produced by overhead conductors, and solves the inverse problem of conductor height estimation using a physics-informed recurrent neural network encoding the Biot-Savart law and IEEE 738 thermal balance equations, enabling real-time dynamic line rating that safely increases transfer capacity by 15–40% at $85 per sensor node with no conductor contact required.

Claims: 10 References: 14 Filed: 2026-04-19
Urban street during heavy rainstorm with IoT water level sensors in storm drains and digital flood depth prediction overlay
LITF-PA-2026-014 · UrbanTech / Climate Resilience

System and Method for Real-Time Urban Flash Flood Depth Prediction and Dynamic Pedestrian-Vehicle Routing Using Distributed Stormwater Level Sensor Networks, LiDAR-Derived Digital Elevation Models, and Physics-Constrained Graph Neural Networks

A system that deploys low-cost ultrasonic water level sensors inside storm drain manholes and catch basins, fuses real-time hydraulic observations with NEXRAD radar rainfall data and municipal pipe network GIS, and uses a physics-constrained graph neural network to predict street-level flood depths 15–60 minutes before overflow occurs, feeding a routing API that dynamically reroutes pedestrians and vehicles around predicted inundation zones.

Claims: 10 References: 14 Filed: 2026-04-17
Vineyard row with ultrasonic sensor pods mounted near grapevine stems for acoustic emission monitoring
LITF-PA-2026-013 · AgTech / Precision Irrigation

System and Method for Continuous Crop Water Stress Detection and Precision Irrigation Scheduling via Contactless Monitoring of Plant Xylem Cavitation Acoustic Emissions Using Ultrasonic MEMS Microphone Arrays and Edge-Deployed Neural Networks

A system that detects crop water stress by listening to ultrasonic clicks produced by xylem cavitation events using contactless MEMS microphone arrays positioned near plant stems, classifying stress levels with an on-device temporal convolutional network, and triggering precision irrigation only when and where plants signal physiological need, targeting 20–40% water savings over timer-based or soil-moisture-only systems at $13 per monitored plant.

Claims: 10 References: 14 Filed: 2026-04-15
HVAC compressor with current transformer clamp on power cable and digital waveform analysis overlay
LITF-PA-2026-012 · BuildingTech / HVAC AI

System and Method for Non-Invasive Refrigerant Charge Estimation in Vapor-Compression HVAC Systems via Compressor Motor Current Signature Analysis and Edge-Deployed Time-Frequency Neural Networks

A system that estimates refrigerant charge level by clamping a $3 split-core current transformer around the compressor power cable and analyzing the motor current waveform's time-frequency signature with an on-device CNN, detecting Β±5% charge deviations and fault conditions (liquid slugging, active leaks, valve wear) without any refrigerant-side instrumentation, EPA certification, or system downtime.

Claims: 10 References: 14 Filed: 2026-04-14
City bus with undercarriage sensor array driving over roadway with cross-section showing subsurface void
LITF-PA-2026-011 · Infrastructure / Geotechnical AI

System and Method for Continuous Subsurface Void Detection Beneath Roadway Surfaces Using Fleet-Vehicle-Mounted Acoustic Resonance Sensing and Edge-Deployed Spectral Convolutional Neural Networks

A system that repurposes ordinary municipal fleet vehicles (transit buses, refuse trucks, street sweepers) as mobile subsurface void detectors by mounting low-cost MEMS accelerometer arrays and contact microphones to vehicle undercarriages, analyzing the tire-road vibroacoustic coupling signature with an on-device spectral CNN, and aggregating multi-pass observations via Bayesian spatial fusion to build probabilistic city-scale void hazard maps without dedicated survey equipment.

Claims: 10 References: 14 Filed: 2026-04-13
Inline laser scattering sensor in water pipe with light beams refracting through particles
LITF-PA-2026-008 · WaterTech / Environmental AI

System and Method for Continuous Microplastic Detection and Polymer-Type Classification in Municipal Water Distribution Systems Using Inline Multi-Angle Light Scattering and On-Device Neural Network Particle Identification

An inline flow-through optical cell using a 635 nm laser and eight-angle photodetector array that produces Mie scattering profiles for each particle, classified by an on-device 1D-CNN into polymer type (PE, PP, PS, PET, nylon) and size bin, enabling continuous real-time microplastic monitoring across water distribution networks at under $120 per sensor node.

Claims: 10 References: 14 Filed: 2026-04-09
Underground water pipe cross-section with vibro-acoustic sensor arrays
LITF-PA-2026-007 · Infrastructure / AI

System and Method for Non-Invasive Buried Pipe Condition Assessment Using Surface-Mounted Vibro-Acoustic Sensor Arrays and Physics-Informed Graph Neural Networks

A non-invasive system that deploys piezoelectric accelerometers at fire hydrants and valve boxes, propagates guided elastic waves through buried pipe walls, and uses a physics-informed graph neural network encoding network topology to infer pipe material, wall thickness, corrosion grade, and remaining useful life without excavation.

Claims: 10 References: 14 Filed: 2026-04-08
Wearable IMU sensor on ankle for gait analysis
LITF-PA-2026-001 Β· Wearables / HealthTech

System and Method for Continuous Neurodegeneration Screening via Consumer Wearable Gait Microanalysis

An on-device inference pipeline that detects sub-clinical gait asymmetries from consumer IMU data, generating a longitudinal neurodegeneration risk score without cloud connectivity or clinical hardware.

Claims: 8 References: 14 Filed: 2026-03-31
Stacks of municipal code books with digital overlay
LITF-PA-2026-002 Β· LegalTech / LLM

System and Method for Automated Detection of Contradictions in Municipal Code Using Large Language Models

An LLM-based pipeline that ingests complete municipal code corpora, identifies logical contradictions between ordinances, and generates structured conflict reports with citation chains for legislative review.

Claims: 9 References: 12 Filed: 2026-03-31
Smartphone placed on concrete bridge surface for vibration analysis
LITF-PA-2026-003 Β· CivicTech / CV

System and Method for Passive Structural Health Monitoring of Bridges Using Consumer Smartphone Accelerometers and Computer Vision

A crowdsourced system combining smartphone accelerometer data from vehicles crossing bridges with periodic computer-vision crack detection from dashcam footage, generating structural health scores without dedicated sensor installations.

Claims: 10 References: 15 Filed: 2026-03-31
Microphone sensor array in agricultural field with bees
LITF-PA-2026-004 Β· AgTech / BioAcoustics

System and Method for Real-Time Pollinator Census in Agricultural Fields Using Edge-Deployed Bioacoustic Classification

A distributed network of low-cost MEMS microphone nodes running on-device audio classification models to identify, count, and map pollinator species activity across agricultural parcels in real time, enabling precision pollination management.

Claims: 9 References: 13 Filed: 2026-03-31
Row of electric vehicles connected to bidirectional chargers
LITF-PA-2026-005 Β· EnergyTech / Grid

System and Method for Synthetic Grid Inertia Generation Using Coordinated Electric Vehicle Battery Discharge with Predictive Frequency Deviation Modeling

A hierarchical control system that monitors grid frequency in real time and coordinates millisecond-scale power injection from distributed EV batteries to provide synthetic rotational inertia, replacing retiring synchronous generators without dedicated grid-scale storage.

Claims: 10 References: 14 Filed: 2026-03-31
Financial network topology diagram with settlement nodes
LITF-PA-2026-006 Β· FinTech / Infrastructure

System and Method for Real-Time Multilateral Settlement Netting Across Heterogeneous Payment Rails Using Graph-Based Obligation Compression

A settlement engine that ingests payment obligations from multiple rails (ACH, Fedwire, SWIFT, RTP, stablecoin ledgers), constructs a real-time obligation graph, and computes optimal multilateral netting sets that reduce gross settlement volume by 60-80%, lowering systemic liquidity requirements without requiring participants to share a single ledger.

Claims: 9 References: 12 Filed: 2026-03-31

πŸ› οΈ Do This Yourself

You don't need a law firm or a patent agent to establish prior art. A public git repository with verifiable timestamps is sufficient under 35 U.S.C. Β§ 102. Here's why it works and how to do it.

Why Git Works for Prior Art

What Makes a Strong Disclosure

A disclosure must be enabling — detailed enough that a person having ordinary skill in the art (PHOSITA) could build it. Vague ideas don't count. Include:

Quick Start (5 minutes)

# 1. Create a public repo
gh repo create your-name/prior-art --public --clone
cd prior-art

# 2. Add CC0 license (public domain)
curl -o LICENSE https://creativecommons.org/publicdomain/zero/1.0/legalcode.txt
git add LICENSE && git commit -m "Add CC0 license"

# 3. Write your disclosure (see template)
vim inventions/2026-04-14-001-your-invention.md

# 4. Commit with a descriptive message
git add inventions/
git commit -m "Prior art: Your Invention Title (PREFIX-2026-001)"
git push origin main

# 5. Archive to Wayback Machine for third-party timestamp
curl "https://web.archive.org/save/https://github.com/YOUR-USER/prior-art"

For AI Agents (OpenClaw, etc.)

AI agents can automate the entire process. Clone the repo, generate a patent-grade disclosure following the template, verify all citations are real, commit, and push. Set up a daily cron and your agent publishes defensive prior art on autopilot.

Full instructions with code samples, quality checklist, and template: HOW-TO-PRIOR-ART.md on GitHub β†’

Legal Context

What this does: Establishes a public disclosure date. Prevents anyone from patenting the described claims. Creates a record patent examiners can find. Dedicates the invention to the public domain under CC0.

What this doesn't do: Grant you a patent or exclusive rights. Guarantee a patent examiner will find it. Constitute legal advice.

Under the America Invents Act (AIA), the U.S. is "first inventor to file." Your publication can invalidate a later-filed patent, but you can't get one either (CC0 dedication is intentional). International rules vary — the European Patent Convention has no grace period.