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)

US6305379
0 cases1/8 sections
US6305379 — Patent Overview Title: Process for producing osteoinductive bone, and osteoinductive bone produced thereby Patent number: US6305379B1 Inventor: Lloyd Wolfinbarger, Jr. Assignee/original assignee: Lifenet Health (earlier…
View full analysis →added 9/23/2026
US6307550
0 cases1/8 sections
Patent Overview — US 6,307,550 B1 Title: Extracting photographic images from video Patent number / application: US 6,307,550 B1; application US09/339,475, filed 1999-06-23; granted/publication date 2001-10-23. Priority date listed as…
View full analysis →added 9/23/2026
US6309052
0 cases1/8 sections
Patent Overview — US 6309052 B1 Title: High thermal efficiency ink jet printhead Patent number: US6309052B1 Application number: US09/385,297 Inventor(s): Rama Prasad; Todd A. Cleland; Robert C Maze; Dale R. Oughton Original assignee…
View full analysis →added 9/23/2026
US6310366
0 cases1/8 sections
Patent Overview — US 6,310,366 B1 Title: "Retrograde well structure for a CMOS imager" Patent number / application: US 6,310,366 B1; Application US09/334,261. Inventors: Howard E. Rhodes and Mark Durcan. Assignee: Original assignee Micron…
View full analysis →added 9/23/2026
US6312115
0 cases1/8 sections
Patent Overview: US 6,312,115 B1 Title: Ink cartridge for ink jet recorder and method of manufacturing same Patent number: US 6,312,115 B1 Application number: US 09/041,890 Assignee: Seiko Epson Corporation (original and current assignee…
View full analysis →added 9/21/2026
US6315398
0 cases1/8 sections
Patent Overview — US 6,315,398 B1 Title: Thermal ink jet heater design Patent number / application: US 6,315,398 B1; application US 07/963,969 Assignee: Xerox Corp (original and current assignee as listed) Key dates: - Priority / filing…
View full analysis →added 9/23/2026
US6317594
0 cases1/8 sections
Patent Overview — US 6,317,594 B1 Title: System and method for providing data to a wireless device upon detection of activity of the device on a wireless network Patent number: US6317594B1 Application number: US09/399,012 Inventors…
View full analysis →added 9/20/2026
US6317707
0 cases1/8 sections
Patent Overview Title: Automatic clustering of tokens from a corpus for grammar acquisition Patent No.: US6317707B1 Application No.: US09/207,326 Inventors: Srinivas Bangalore; Giuseppe Riccardi Original Assignee: AT&T Inc. Current…
View full analysis →added 9/23/2026
US6321336
0 cases1/8 sections
US6321336B1 — System and Method for Redirecting Network Traffic to Provide Secure Communication Bibliographic data (as supplied): Patent number US6321336B1; application US09/042,293; inventors John Applegate and Jeff Romatoski; original…
View full analysis →added 9/23/2026
US6334062
0 cases1/8 sections
US6334062B1 — Patent Overview Title: Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages Patent number: US6334062B1 Application number: US08/487,043 Inventor: Russell P. Cashman…
View full analysis →added 9/23/2026
US6339401
0 cases1/8 sections
Patent Overview: US 6,339,401 B2 Title: Antenna for portable radio Assignee: Yokowo Co., Ltd. (original and current assignee as listed) Inventor: Tadashi Oshiyama Priority date: 1998-12-22 | Filing date: 2000-12-12 | Publication date…
View full analysis →added 9/23/2026
US6345300
0 cases1/8 sections
Patent Overview — US 6,345,300 B1 Title: Method and apparatus for detecting a user-controlled parameter from a client device behind a proxy Assignee: Intel Corp (original assignee; assignment recorded 1998-04-30) Inventors: Bikram Singh…
View full analysis →added 9/21/2026
US6345336
0 cases1/8 sections
Patent Overview — US 6,345,336 B1 Title: Instruction cache memory includes a clock gate circuit for selectively supplying a clock signal to tag RAM to reduce power consumption Patent number: US 6,345,336 B1 Inventor: Masafumi Takahashi…
View full analysis →added 9/21/2026
US6349336
0 cases1/8 sections
Patent Overview — US 6,349,336 B1 Title: Agent/proxy connection control across a firewall Patent number / application: US 6,349,336 B1; Application US09/504,157 Inventors: Eric N. Sit, James Clough, Dean S. Nelson Assignee: Hewlett-Packard…
View full analysis →added 9/23/2026
US6362178
0 cases1/8 sections
Patent Overview: US6362178B1 Title: 2-phenyl substituted imidazotriazinones as phosphodiesterase inhibitors Assignee: Original assignee Bayer AG; current assignee listed as Bayer Intellectual Property GmbH (the source notes listed…
View full analysis →added 9/21/2026
US6362610
0 cases1/8 sections
Patent Overview — US 6,362,610 B1 Title: Universal USB power supply unit Inventor: Fu-I Yang Assignee: Individual (original and current assignee listed) Application No.: US 09/928,685 Priority/Filing Date: 2001-08-14 Publication (Grant)…
View full analysis →added 9/24/2026
US6363056
0 cases1/8 sections
Patent Overview — US6363056B1 Title: Low overhead continuous monitoring of network performance Patent number: US6363056B1 Application number: US09/115,438 Inventors: Mandis Sadr Mohammad Beigi; Raymond Byars Jennings; Dinesh Chandra Verma…
View full analysis →added 9/23/2026
US6363065
0 cases1/8 sections
Patent Overview — US6363065B1 Title: "Apparatus for a voice over IP (VoIP) telephony gateway and methods for use therein" Patent number / application: US6363065B1; Application US09/437,644, filed 1999-11-10. Inventors: Timothy R. Thornton…
View full analysis →added 9/23/2026
US6363345
0 cases1/8 sections
Patent Overview — US 6,363,345 B1 Title: System, method and apparatus for cancelling noise Patent number: US6363345B1 (application US09/252,874) Inventors: Joseph Marash; Baruch Berdugo Assignee of record (current, per listing): Andrea…
View full analysis →added 9/23/2026
US6370137
0 cases1/8 sections
Patent Overview — US 6,370,137 B1 Title: "Method and apparatus for providing broadband access conferencing services" Patent number / application: US 6,370,137 B1; Application No. US 09/366,031. Assignee: Original assignee listed as…
View full analysis →added 9/23/2026