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 patent
Drop a US patent number — we’ll verify it on Google Patents and generate the full invalidity dossier.
By industry
- US63743000 cases1/8 sections
Patent Overview: US6374300B2 Title: Method and system for storing load balancing information with an HTTP cookie Patent Number / Application: US6374300B2 (Application No. US09/353,335) Inventor: Richard R. Masters Original Assignee: F5…
View full analysis →added 9/23/2026 - US63778100 cases1/8 sections
Patent Overview — US 6,377,810 B1 Title: Method of operation of mobile wireless communication system with location information Patent number / application: US 6,377,810 B1; Application US09/330,739, filed 1999-06-11. Priority date listed…
View full analysis →added 9/23/2026 - US63808540 cases1/8 sections
Patent Overview — US 6380854 B1 Title: Remote Alarm Tester Inventors: Eric Hagerman; Steve Carrick Original/Current Assignee: Individual Application No.: US09/584,681 Priority/Filing Date: 2000-05-31 Publication (Grant) Date: 2002-04-30…
View full analysis →added 9/23/2026 - US63866740 cases1/8 sections
Patent Overview — US 6,386,674 B1 Title: Independent power supplies for color inkjet printers Patent number / application: US 6,386,674 B1; application US09/429,942, filed 1999-10-29. Assignee / inventors: Original assignee Hewlett-Packard…
View full analysis →added 9/17/2026 - US63927270 cases1/8 sections
Patent Overview — US 6,392,727 B1 Title: Reduced reflectance polarized display Patent number / application: US 6,392,727 B1; Application US09/224,591 Inventors: Brent D. Larson; Elias S. Haim Assignee / current assignee (as listed)…
View full analysis →added 9/23/2026 - US63930120 cases1/8 sections
Patent Overview: US6393012B1 Title: System for allocating resources in a communication system Patent number: US6393012B1 Application number: US09/479,735 Inventor: Rajesh K. Pankaj Original/Current Assignee: Qualcomm Inc (assignment to…
View full analysis →added 9/21/2026 - US63934740 cases1/8 sections
Patent Overview: US6393474B1 Title: Dynamic policy management apparatus and method using active network devices Patent number: US6393474B1 | Application: US09/223,829 Assignee/current assignee (as listed): Original assignee 3Com Corp…
View full analysis →added 9/21/2026 - US63972410 cases1/8 sections
Patent Overview — US 6,397,241 B1 Title: Multiplier cell and method of computing Patent number: US6397241B1 Application number: US09/215,935 Inventors: Philipp Michael Glaser; Michael J. Torla Original assignee: Motorola, Inc. Current…
View full analysis →added 9/21/2026 - US64023020 cases1/8 sections
Patent Overview: US 6,402,302 B1 Title: Liquid discharge head, manufacturing method thereof, and microelectromechanical device Patent number: US 6,402,302 B1 Application number: US 09/584,784 Inventors: Teruo Ozaki; Akihiro Yamanaka…
View full analysis →added 9/23/2026 - US64023340 cases1/8 sections
Patent Overview — US 6402334 B1 Title: Light pipe with quadraspherical depressions for display panels Inventor: Lee Yu-San Original Assignee: Garmin Corp Taiwan (current assignee listing also names Garmin Corp USA; Google notes assignee…
View full analysis →added 9/23/2026 - US64050490 cases1/8 sections
Patent Overview — US 6,405,049 B2 Title: Portable data terminal and cradle Patent number / application: US 6,405,049 B2; application US 08/906,722 Inventors: Allan Herrod, John Klein, Sarosh Vesuna, Simon Bard Assignee: Symbol Technologies…
View full analysis →added 9/24/2026 - US64053180 cases1/8 sections
US 6,405,318 B1 — Intrusion Detection System: Overview Title: Intrusion Detection System Patent number: US 6,405,318 B1 Inventor: Craig H. Rowland Original assignee: Psionic Software Inc. (current assignee listed as Cisco Technology…
View full analysis →added 9/20/2026 - US64196430 cases1/8 sections
Patent Overview — US 6,419,643 B1 Title: Central venous catheter with heat exchange properties Patent number: US6419643B1 | Application number: US09/376,524 | Filing date: 1999-08-18 | Publication/grant date: 2002-07-16 | Priority date…
View full analysis →added 9/23/2026 - US64213500 cases1/8 sections
Patent Overview — US6421350B1 Title: Device and method for controlling the quality-of service in data networks Patent number: US6421350B1 Application number: US08/940,781 Inventors: Edward Stanley Szurkowski; William Philip Weber, Jr…
View full analysis →added 9/23/2026 - US64288140 cases1/8 sections
Patent Overview — US 6,428,814 B1 Title: Bioadhesive nanoparticulate compositions having cationic surface stabilizers Patent number: US 6,428,814 B1 Application number: US 09/414,159 Inventors: H. William Bosch; Eugene R. Cooper; Simon L…
View full analysis →added 9/23/2026 - US64324370 cases1/8 sections
Patent Overview — US 6,432,437 B1 Title: Soft tissue augmentation material Patent number: US6432437B1 Inventor: William G. Hubbard Original assignee: Bioform Inc Current assignee (as listed): Merz Aesthetics Inc Application number…
View full analysis →added 9/23/2026 - US64345300 cases1/8 sections
Patent Overview: US6434530B1 — Interactive Shopping System with Mobile Apparatus Title: Interactive Shopping System with Mobile Apparatus Patent Number: US6434530B1 Application Number: US09/233,825 Inventors: Martin A. Sloane; Tod Bogan…
View full analysis →added 9/24/2026 - US64347550 cases1/8 sections
Patent Overview: US 6,434,755 B1 — "Helmet" Title: Helmet Patent number: US 6,434,755 B1 Application number: US09/586,124 Inventors: P. David Halstead; Cherie F. Alexander; Thad Ide Original assignee (per source): Southern Impact Research…
View full analysis →added 9/17/2026 - US64404580 cases1/8 sections
Patent Overview — US 6,440,458 B1 Title: Sustained release preparations Patent number: US6440458B1 Assignee/owner of record (per the supplied text): Original assignee Fujisawa Pharmaceutical Co., Ltd.; current assignee listed as Astellas…
View full analysis →added 9/23/2026 - US64425500 cases1/8 sections
Patent Overview — US 6,442,550 B1 Title: System and method in a collaborative data processing environment for customizing the quality of service on a per-client basis Assignee/Inventor: International Business Machines Corp.; inventor…
View full analysis →added 9/23/2026