The catalog

Patent invalidity dossiers.

7,248 patents in the database, sorted by number of on-file litigation cases. Of these, 2,988 have at least one tracked case across 6,606 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)(1343)Medical (M)(713)High-Tech (T)(550)Wireless Technologies(508)Semiconductor (T)(386)Automotive (A)(298)Industrial Manufacturing (IM)(295)Media & Broadcasting (T)(189)Biotechnology(153)Energy (E)(147)Optical Technology(144)Financial Technology (FT)(132)Sporting Goods (S)(84)Other (O)(73)Audio Technology(66)Consumer Durables(56)Home Appliance (HA)(48)Lighting (L)(47)Footwear(37)Agriculture (AG)(36)Firearms (F)(36)Gaming (G)(36)Food (FD)(35)Railroad(33)Home Security(31)Optical Communication(22)Audience Measurement(19)Plumbing(16)Baby Products(12)Printing Technology(10)Fire Safety (FS)(6)Retail Security(6)Telecommunications(5)Tech (T)(4)Aerospace(3)Aerospace (AS)(3)Printing Technology (P)(3)Aerospace (A)(2)Construction (C)(2)Printing (P)(2)Retail Technology (RT)(2)Telecommunications (T)(2)Telecommunications (TC)(2)Toys(2)Advertising (AD)(1)Aerospace (Ae)(1)Aviation(1)Aviation (AV)(1)Building & Construction(1)Building Construction (BC)(1)Building Materials(1)Chemical (C)(1)Chemical Sensing(1)Cosmetics (C)(1)Data Communication(1)Document Security(1)Electrical Components(1)Environmental Monitoring (EM)(1)Fencing(1)Fire Safety(1)Furniture (F)(1)High-Tech(1)Logistics (L)(1)Logistics & Shipping(1)Marine (M)(1)Maritime Logistics(1)Musical Instruments (MI)(1)Networking (N)(1)Office Equipment(1)Office Equipment (OE)(1)Paints & Coatings(1)Pet Products(1)Printing(1)Printing Technology (PT)(1)Retail Technology(1)Retail Technology (R)(1)Software Technology (T)(1)Textiles(1)Textiles (TX)(1)Tobacco (TB)(1)Vaping (V)(1)Video Surveillance(1)Video Technology(1)Water Treatment(1)

US6155487
0 cases1/8 sections
Patent Overview — US 6,155,487 B1 Title: Re-writable display device and system Patent number / application: US 6,155,487 A (application US09/443,829) Inventors: Robert Dean; Raymond Bennett Assignee: Individual (original assignee listed as…
View full analysis →added 9/23/2026
US6160808
0 cases1/8 sections
Patent Overview — US 6,160,808 A Title: Technique for transmitting incoming multi-link point-to-point (PPP) packet traffic over multiple outgoing links in a multi-link bundle Patent number / application: US 6,160,808 A; Application US…
View full analysis →added 9/23/2026
US6160813
0 cases1/8 sections
Patent Overview — US 6,160,813 A Title: Fibre channel switching system and method Patent number: US 6,160,813 A Application number: US 08/823,025 Inventors: David C. Banks; Steven L. Farnworth; Bent Stoevhase; Paul Ramsay Assignee (per…
View full analysis →added 9/23/2026
US6163544
0 cases1/8 sections
Patent Overview — US6163544A Title: Configuration method for auxiliary resources Patent number: US6163544A Application number: US09/093,075 Inventors: Staffan Andersson; Lars Kent Konradsson Original/current assignee: Telefonaktiebolaget…
View full analysis →added 9/23/2026
US6165484
0 cases1/8 sections
Patent Overview: US 6165484 A Title: EDTA and other chelators with or without antifungal antimicrobial agents for the prevention and treatment of fungal infections Assignee/Current Assignee (per source): University of Texas System and Wake…
View full analysis →added 9/23/2026
US6170051
0 cases1/8 sections
Patent Overview — US 6,170,051 B1 Title: "Apparatus and method for program level parallelism in a VLIW processor" Source: https://patents.google.com/patent/US6170051/en Identifiers and dates (per supplied text): Application US08/996,526…
View full analysis →added 9/23/2026
US6172809
0 cases1/8 sections
Patent Overview — US 6,172,809 B1 Title: Surface light source device with polarization function Patent number: US 6,172,809 B1 Application number: US09/127,822 Inventors: Yasuhiro Koike; Takayuki Arai Assignee: Enplas Corp (original…
View full analysis →added 9/23/2026
US6181867
0 cases1/8 sections
Patent Overview: US6181867B1 Title: Video storage and retrieval system Patent number: US6181867B1 Application number: US08/486,517 Inventors: Brian Kenner; Harry Gruber Original/Current Assignee (per listing): Intervu Inc Priority/Filing…
View full analysis →added 9/23/2026
US6185482
0 cases1/8 sections
Patent Overview — US 6,185,482 B1 Title: System and method for rms overcurrent backup function Patent number / application: US 6,185,482 B1; Application US 09/037,359 Inventors: Michael Egolf, David G. Hart, James D. Stoupis Original…
View full analysis →added 9/23/2026
US6189786
0 cases1/8 sections
Summary: US Patent 6,189,786 (US6189786B1) Search notes / verification: Searches of the USPTO-oriented databases (Google Patents, FreePatentsOnline, Justia, patent leaderboards) all confirm the bibliographic data below for the exact number…
View full analysis →added 8/26/2026
US6193985
0 cases1/8 sections
Patent Overview — US 6,193,985 B1 Title: Tocopherol compositions for delivery of biologically active agents Patent number: US 6,193,985 B1 (application US 08/856,054) Inventor: Mette Rydahl Sonne Original assignee: Dumex AS. The listed…
View full analysis →added 9/23/2026
US6199753
0 cases1/8 sections
I'll run targeted searches for this patent number and related litigation, then summarize. Summary: US 6,199,753 B1 Important caveat up front: The full claim text of US 6,199,753 was not included in the authoritative patent text supplied to…
View full analysis →added 9/23/2026
US6201081
0 cases1/8 sections
Patent Overview — US 6,201,081 B1 Title: Catalyst efficiency for supported metallocene catalyst Assignee/Current Assignee (as listed): Fina Technology, Inc. (also listed as "Fine Tech Inc") Inventors: Edwar S. Shamshoum; Margarito Lopez…
View full analysis →added 9/21/2026
US6202081
0 cases1/8 sections
Patent Overview — US6202081B1 Title: "Method and protocol for synchronized transfer-window based firewall traversal" Patent number / application: US6202081B1; Application US09/119,987 Assignee / inventor: Original assignee 3Com Corp…
View full analysis →added 9/21/2026
US6211883
0 cases1/8 sections
Patent Overview — US 6,211,883 B1 Title: Patch-flatness test unit for high order rational surface patch rendering systems Patent number: US 6,211,883 B1 Application number: US08/921,918 Inventor: Vineet Goel Original assignee: LSI Logic…
View full analysis →added 9/23/2026
US6214376
0 cases1/8 sections
Patent Overview — US 6,214,376 B1 Title: Non-gelatin substitutes for oral delivery capsules, their composition and process of manufacture Patent number: US 6,214,376 B1 Application number: US 09/140,758 Inventor: Aristippos Gennadios…
View full analysis →added 9/23/2026
US6219706
0 cases1/8 sections
Patent Overview — US 6219706 B1 Title: Access control for networks Patent number: US 6219706 B1 Application number: US09/174,200 Inventors: Serene Fan; Steve Truong Assignee: Cisco Technology, Inc. (original assignee; listed current…
View full analysis →added 9/23/2026
US6219786
0 cases1/8 sections
Patent Overview: US 6,219,786 B1 Title: Method and system for monitoring and controlling network access Patent number: US 6,219,786 B1 Application number: US09/150,264 Inventors: Mark Cunningham; Andrew Trevarrow Original assignee…
View full analysis →added 9/23/2026
US6223029
0 cases1/8 sections
Patent Overview — US 6,223,029 B1 Title: Combined mobile telephone and remote control terminal Patent number: US 6,223,029 B1 Application number: US 08/845,938 Inventors: Anna-Karin Stenman, Mats Pettersson, Torbjörn Gärdenfors…
View full analysis →added 9/21/2026
US6226752
0 cases1/8 sections
Patent Overview: US 6,226,752 B1 Title: Method and apparatus for authenticating users Patent Number: US 6,226,752 B1 Application Number: US09/309,341 Inventors: Abhay Gupta, Chris Ferris, Alejandro Abdelnur Original Assignee: Sun…
View full analysis →added 9/23/2026