The catalog

Patent invalidity dossiers.

3,785 patents in the database, sorted by number of on-file litigation cases. Of these, 1,867 have at least one tracked case across 3,899 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)(718)High-Tech (T)(462)Medical (M)(309)Wireless Technologies(240)Semiconductor (T)(142)Automotive (A)(104)Industrial Manufacturing (IM)(86)Energy (E)(73)Media & Broadcasting (T)(62)Sporting Goods (S)(57)Other (O)(56)Financial Technology (FT)(49)Biotechnology(37)Lighting (L)(30)Audio Technology(28)Gaming (G)(25)Optical Technology(22)Food (FD)(21)Home Appliance (HA)(20)Firearms (F)(17)Footwear(15)Agriculture (AG)(12)Railroad(12)Consumer Durables(9)Baby Products(7)Home Security(7)Optical Communication(6)Audience Measurement(5)Plumbing(5)Tech (T)(4)Building Materials(1)Cosmetics (C)(1)Data Communication(1)Electrical Components(1)Furniture (F)(1)Logistics (L)(1)Logistics & Shipping(1)Pet Products(1)Printing Technology(1)Software Technology (T)(1)Textiles(1)Toys(1)Vaping (V)(1)Video Technology(1)