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📜 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. § 102. Every reference is real. New disclosure every day. Verified timestamps on GitHub →

Wearable IMU sensor on ankle for gait analysis
LITF-PA-2026-001 · 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 · 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 · 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 · 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 · 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 · 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