Invalidity dossier
US 7308143
Picture coding method and picture decoding method
Current assignee: VIDEOLABS Inc
Added 9/23/2026, 1:55:02 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US7308143B2
Title: Picture coding method and picture decoding method
Patent number: US7308143B2
Application number: US11/453,078
Inventor(s): Kiyofumi Abe; Shinya Kadono; Satoshi Kondo; Makoto Hagai
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee (as listed): VIDEOLABS Inc; Panasonic Holdings Corp
Priority date: 2002-04-15
Filing date: 2006-06-15
Publication date: 2007-12-11
Legal status: Expired – Lifetime (anticipated expiration 2023-03-27)
Purpose and plain-language scope (from the supplied text):
The patent relates to coding and decoding of pictures (image/video signals). The classification data supplied describe methods "for coding, decoding, compressing or decompressing digital video signals," including adaptive coding, selection of coding mode or prediction mode, selection of a reference unit for prediction, spatial predictive coding modes, adaptive entropy coding (e.g., AVLC or CABAC), and coding units based on image regions such as objects or blocks.
In plain terms, the disclosed subject matter concerns how a picture is predicted and encoded/decoded — choosing among prediction modes and reference units, and applying adaptive entropy coding to the resulting data. The prior-art keywords listed are "coefficients," "unit," "picture," "blocks," and "value," indicating the disclosure works with block/unit-level coefficient values.
What the excerpt does not establish:
The supplied text is a bibliographic and classification excerpt; it contains no claims, no detailed description, and no drawings. It therefore does not establish the specific claimed scope, the exact coding steps, any embodiment details, the number or wording of claims, or the technical relationship to any named standard. The assignee listings are expressly described as assumptions that Google has not verified, and the excerpt likewise does not establish litigation, ownership transfers, validity, or prior-art effect. The legal status is also stated as an assumption, not a legal conclusion.
Source: https://patents.google.com/patent/[US7308143](/patent/US7308143)/en
Generated 10/1/2026, 9:52:43 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 7308143. The free-form analysis below may also discuss cases beyond this list.
No cases on file mention this patent. Upload a CSV or add a case manually in Admin → Manage litigation cases.
Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Proceedings on file (0)
All PTAB activity →AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
Earlier patents, publications, and products that may anticipate or render the claims unpatentable.
Obviousness
Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.
Extensions
Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.
Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.