The catalog

Patent invalidity dossiers.

7,163 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)
  • US6560211
    0 cases1/8 sections

    Patent Overview — US 6,560,211 B2 Title: Method and apparatus for variable and fixed forward link rate control in a mobile radio communication system. Assignee/Original Assignee: Qualcomm Inc. Key dates (per the supplied record): Priority…

    View full analysis →added 9/21/2026
  • US6560230
    0 cases1/8 sections

    Patent Overview — US6560230B1 Title: Packet scheduling methods and apparatus Patent number: US6560230B1 | Application number: US09/316,930 Inventor(s): Renwei Li; Peter Wai-Tong Kwong; Paul Terry; Ronald Leonard Westfall Original assignee…

    View full analysis →added 9/23/2026
  • US6560639
    0 cases1/8 sections

    Patent Overview — US 6,560,639 B1 Title: System for web content management based on server-side application Patent number / application: US 6,560,639 B1; Application US 09/249,061 Inventors: Noah Dan; Albert C. Brown Dates (as listed)…

    View full analysis →added 9/23/2026
  • US6560740
    0 cases1/8 sections

    Patent Overview: US6560740 Title: Apparatus and method for programmable built-in self-test and self-repair of embedded memory Patent number: US6560740 (US6560740B1) Assignee: Advanced Micro Devices, Inc. (original assignee, per the…

    View full analysis →added 9/21/2026
  • US6563501
    0 cases1/8 sections

    Patent Overview — US 6,563,501 B2 Title: Bicubic surface rendering Patent number / application: US 6,563,501 B2; Application US09/734,438 Inventor: Adrian Sfarti Assignee / current assignee (per listing): 3d Surfaces LLC; Surface 3d LLC…

    View full analysis →added 9/23/2026
  • US6563918
    0 cases1/8 sections

    Patent Overview — US 6,563,918 B1 Title: Telecommunications system architecture for connecting a call Patent number: US 6,563,918 B1 Application number: US 09/026,906 Assignee: Sprint Communications Co LP (originally assigned to Sprint…

    View full analysis →added 9/23/2026
  • US6565175
    0 cases1/8 sections

    Patent Overview — US 6,565,175 B1 Title: Integrated printhead Patent number: US 6,565,175 B1 Inventors: Alessandro Scardovi; Renato Conta Original assignee: Olivetti Tecnost SpA (current assignee listed as SICPA Holding SA) Key dates…

    View full analysis →added 9/23/2026
  • US6565225
    0 cases1/8 sections

    Patent Overview — US 6,565,225 B2 Title: Bar-shaped light guide, beam lighting device using the bar-shaped light guide, and surface lighting device using the beam lighting device Assignee: Sanyo Electric Co., Ltd. Inventors: Koji Mabuchi…

    View full analysis →added 9/23/2026
  • US6569761
    0 cases1/8 sections

    Patent Overview — US 6,569,761 B2 Title: Method for shrinking critical dimension Source: https://patents.google.com/patent/US6569761/en Bibliographic data (as supplied): Inventor Ching-Yu Chang; original and current assignee Macronix…

    View full analysis →added 9/23/2026
  • US6572543
    0 cases1/8 sections

    Patent Overview — US 6572543 B1 Title: Sensor, method of sensor implant and system for treatment of respiratory disorders Patent number: US 6572543 B1 Application number: US09/589,002 Filing date: 2000-06-06 Publication (grant) date…

    View full analysis →added 9/23/2026
  • US6574612
    0 cases1/8 sections

    Patent Overview: US 6,574,612 B1 — "License Management System" Bibliographic data (as supplied): US Patent 6,574,612 B1; Application No. US09/342,555; filed 1999-06-29; priority date 1999-02-19; granted/publication date 2003-06-03…

    View full analysis →added 9/23/2026
  • US6576259
    0 cases1/8 sections

    Patent Overview: US 6,576,259 B2 Title: Sustained release formulations containing tacrolimus Patent number: US6576259B2 Application number: US09/978,025 (filed 2001-10-17) Publication date: 2003-06-10 Priority date: 1998-03-26 (stated as…

    View full analysis →added 9/23/2026
  • US6576665
    0 cases1/8 sections

    Patent Overview: US 6,576,665 B2 Title: Encapsulated calcium acetate caplet and a method for inhibiting gastrointestinal phosphorous absorption Patent number / application: US 6,576,665 B2; Application US09/824,949 Inventors: Edmund V…

    View full analysis →added 9/23/2026
  • US6579184
    0 cases1/8 sections

    Patent Overview — US 6,579,184 B1 Title: Multi-player game system Inventor: Erkki Tanskanen Original assignee: Nokia Inc; later assignments listed to Nokia Mobile Phones Limited, Nokia Technologies Oy, and (currently listed) RPX Corp /…

    View full analysis →added 9/23/2026
  • US6585061
    0 cases1/8 sections

    Patent Overview — US 6,585,061 B2 Title: Calculating directional drilling tool face offsets Source: https://patents.google.com/patent/US6585061/en Bibliographic data (from supplied text): Application US09/976,129; priority/filing date…

    View full analysis →added 9/21/2026
  • US6590889
    0 cases1/8 sections

    Patent Overview — US 6,590,889 B1 Title: "Data communications system and hybrid time-code multiplexing method" Patent number / application: US 6,590,889 B1; application US 09/261,971, filed 1999-03-03; granted/publication date 2003-07-08…

    View full analysis →added 9/23/2026
  • US6593197
    0 cases1/8 sections

    I'll search for the specific patent number and any CAFC 2026 docket references. Let me run a few more targeted searches to verify USPTO records and any CAFC litigation. Let me verify the official USPTO bibliographic data and check for any…

    View full analysis →added 8/27/2026
  • US6597356
    0 cases1/8 sections

    Patent Overview: US6597356B1 Title: Integrated tessellator in a graphics processing unit Patent number: US6597356B1 Application number: US09/718,890 Inventors: Henry P. Moreton, Justin Legakis, Douglas H. Rogers Original/current assignee…

    View full analysis →added 9/23/2026
  • US6598982
    0 cases1/8 sections

    Patent Overview — US 6,598,982 B2 Rearview Mirror Alignment Device Bibliographic data (per supplied source): U.S. Patent 6,598,982 B2; application US 09/872,501, filed June 1, 2001; granted July 29, 2003; priority date June 2, 2000…

    View full analysis →added 9/23/2026
  • US6601104
    0 cases1/8 sections

    Patent Overview: US6601104B1 Title: System and methods for accelerated data storage and retrieval Patent number: US6601104B1 Application number: US09/266,394 Inventor: James J. Fallon Original assignee: Realtime Data LLC (later-recorded…

    View full analysis →added 9/23/2026