The catalog
Patent invalidity dossiers.
1,391 patents in the database, sorted by number of on-file litigation cases. Of these, 1,137 have at least one tracked case across 2,473 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
US Patent 8,273,735: Process for Preparing Benzazepine Compounds Title: Process for preparing benzazepine compounds or salts thereof Current Assignee: Otsuka Pharmaceutical Co Ltd Inventors: Yasuhiro Torisawa, Kaoru Abe, Yasuaki Muguruma…
View full analysis →added 5/22/2026An analysis of United States Patent 8,307,116 reveals the following details: Title: Scalable bus-based on-chip interconnection networks Assignee: University of Texas System Inventors: Stephen W. Keckler, Boris Grot Filing Date: June 19…
View full analysis →added 4/27/2026A concise summary of US Patent 8,320,575 is as follows: Title: Efficient audio signal processing in the sub-band regime Assignee: Cerence Operating Co. Inventors: Gerhard Uwe Schmidt, Hans-Jörg Köpf, Günther Wirsching Filing Date…
View full analysis →added 5/5/2026Here's a concise summary of US Patent 8327051: US Patent Number: US8327051B2 Title: Portable handheld memory card and methods for use therewith Current Assignee: Palisade Technologies LLP (as of August 15, 2024) Original Assignee: SanDisk…
View full analysis →added 5/14/2026- US8327051B21 case →8/8 sections
Summary of US Patent 8327051B2 Title: Portable handheld memory card and methods for use therewith Assignee: As of the latest assignment recorded on August 15, 2024, the assignee is Palisade Technologies, LLP. The original assignee was…
View full analysis →added 5/12/2026 A concise summary of US Patent 8,355,484, including its involvement in recent intellectual property litigation, is provided below. Summary of US Patent 8,355,484 Title: Methods and apparatus for masking latency in text-to-speech systems…
View full analysis →added 5/5/2026US Patent 8368201: Method for Embedding a Component in a Base Title: Method for embedding a component in a base Assignee: Imberatek LLC (Current Assignee listed first, per provided text. Original Assignee: Imbera Electronics Oy) Inventor…
View full analysis →added 5/14/2026Here is a concise summary of US Patent 8,374,358. Title: Method for determining a noise reference signal for noise compensation and/or noise reduction Assignee: The current assignee of record is Cerence Operating Co. The original assignee…
View full analysis →added 5/5/2026Here is a concise summary of US Patent 8,400,835. Title: Non-volatile semiconductor memory Assignee: The original assignee was Panasonic Corporation. However, recent litigation documents from a case in the Eastern District of Texas…
View full analysis →added 5/14/2026US Patent 8468464, titled "Interactive electronically presented map," was issued to Activemap LLC on June 18, 2013, from an application filed on May 29, 2009. The inventors listed are Michael Abramson, Erika Jakubassa, Michael Grisham, and…
View full analysis →added 5/16/2026Summary of U.S. Patent 8,593,358 Title: Active antennas for multiple bands in wireless portable devices Assignee: As of a reassignment on December 31, 2024, the current assignee is Massively Broadband LLC. The original assignee was the…
View full analysis →added 5/12/2026Analysis of U.S. Patent 8,677,398 Date of Analysis: April 26, 2026 This report provides a summary of U.S. Patent 8,677,398, including its key bibliographic data, a summary of its abstract, and a plain-language explanation of its…
View full analysis →added 4/30/2026Patent Summary: US 8,704,762 Title: Display device Assignee: The patent is currently assigned to Paneltouch Technologies LLC. The original assignee was Panasonic Liquid Crystal Display Co., Ltd. Inventors: Kouichi Anno, Takumi Sato…
View full analysis →added 5/13/2026US patent 8891347, titled "User-focusing technique for wireless communication systems," was invented by Xuefeng Yin. The patent was filed on July 28, 2011, and issued on November 18, 2014. The original assignee was Empire Technology…
View full analysis →added 5/14/2026US Patent 8904194: Secure Data Parser Method and System Title: Secure data parser method and system Assignee: Security First Innovations LLC (Current), Security First Corp (Original) Inventors: Rick L. Orsini, Mark S. O'Hare, Roger S…
View full analysis →added 5/14/2026US Patent 8907425, titled "Semiconductor device," was invented by Satoru Itou and Toshie Kutsunai. The patent was filed on June 20, 2012, and issued on December 9, 2014. The original assignee was Panasonic Corp, and the current assignee is…
View full analysis →added 5/14/2026Summary of U.S. Patent 8,941,708 Title: Method, computer-readable storage medium, and apparatus for modifying the layout used by a video composing unit to generate a composite video signal Assignee: Cisco Technology, Inc. Inventor: Hakon…
View full analysis →added 5/12/2026Summary of U.S. Patent 9,112,934 A concise summary of U.S. Patent 9,112,934 is provided below, based on a review of the patent records as of April 26, 2026. Title: Apparatus and method for configuring on-demand content delivering overlay…
View full analysis →added 5/7/2026A concise summary of US Patent 9,235,259 is as follows: Title: Method for detecting audio ticks in a noisy environment Assignee: The current assignee of record is K Mizra LLC. The original assignee was Nederlandse Organisatie voor…
View full analysis →added 4/30/2026A concise summary of US Patent 9,280,220 is as follows: Title: Pulse- or frame-based communication using active stylus Assignee: Wacom Co Ltd Inventors: Shahrooz Shahparnia Vivek Pant Esat Yilmaz Vemund Kval Bakken Kishore Sundara-Rajan…
View full analysis →added 5/13/2026