The catalog

Patent invalidity dossiers.

6,227 patents in the database, sorted by number of on-file litigation cases. Of these, 2,302 have at least one tracked case across 4,986 litigations.

Demand letter analyzer

You got a patent demand letter. Now what?

Paste the letter — we extract the asserted patents, identify the asserter, characterize their litigation history, flag validity vulnerabilities, and draft a sample response letter your attorney can review. Free, private, ~2-3 minutes.

Analyze a letter →

Analyze a patent

Drop a US patent number — we’ll verify it on Google Patents and generate the full invalidity dossier.

By industry

Software Technology & Computing Systems (T)(899)High-Tech (T)(474)Medical (M)(432)Wireless Technologies(340)Semiconductor (T)(206)Media & Broadcasting (T)(133)Automotive (A)(132)Industrial Manufacturing (IM)(124)Biotechnology(92)Energy (E)(90)Financial Technology (FT)(76)Sporting Goods (S)(62)Other (O)(60)Optical Technology(50)Lighting (L)(43)Audio Technology(40)Gaming (G)(31)Food (FD)(23)Home Appliance (HA)(23)Consumer Durables(22)Footwear(19)Agriculture (AG)(18)Firearms (F)(18)Railroad(17)Audience Measurement(14)Optical Communication(14)Home Security(12)Baby Products(10)Plumbing(10)Tech (T)(4)Telecommunications(2)Telecommunications (TC)(2)Aerospace(1)Building Materials(1)Construction (C)(1)Cosmetics (C)(1)Data Communication(1)Electrical Components(1)Furniture (F)(1)High-Tech(1)Logistics (L)(1)Logistics & Shipping(1)Musical Instruments (MI)(1)Office Equipment(1)Pet Products(1)Printing (P)(1)Printing Technology(1)Software Technology (T)(1)Textiles(1)Tobacco (TB)(1)Toys(1)Vaping (V)(1)Video Technology(1)