Invalidity dossier
US 6907142
Method for encoding images, and an image coder
Current assignee: Nokia Technologies Oy
Added 9/23/2026, 12:16:23 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 — US 6907142 B2
Title: Method for encoding images, and an image coder
Patent number / application: US6907142B2; application US09/766,193, filed 2001-01-19.
Priority date: 2000-01-21. Granted / publication date: 2005-06-14.
Inventors: Ossi Kalevo, Joni Vahteri, Bogdan-Paul Dobrin, Marta Karczewicz.
Assignee: Original assignee Nokia Mobile Phones Ltd; current assignee listed as Nokia Technologies Oy. Legal status shown as Expired – Lifetime, expires 2022-11-07.
Purpose: The invention addresses inefficient intra-frame coding in prior art solutions, where transmission of intra-coded frames is bandwidth-excessive, limiting use of independently coded key frames in low bit rate digital image coding. It aims to further reduce redundant information and produce more efficient coding by introducing a spatial prediction scheme for pixel values offering prediction from several directions, allowing efficient prediction of edges with different orientations and savings in bit rate, plus context-dependent selection of prediction methods.
Plain-language scope: The image is divided into blocks. A spatial prediction is performed for a block to reduce transmitted information, with at least one prediction method defined. A classification is determined for at least one neighbouring block of the block to be predicted, based on that neighbouring block's contents. A prediction method is then selected for the current block on the basis of at least one such classification. Corresponding claims cover a device, an encoder, a decoder, a codec, a mobile terminal, and a storage medium for storing a software program, each with means for determining such a classification and selecting a prediction method accordingly. Classification is listed among the prior art keywords (block, prediction, predicted, neighbouring, classification). Classifications include H04N19/593 (predictive coding involving spatial prediction techniques).
Source: https://patents.google.com/patent/US6907142/en
What the excerpt does not establish: It does not provide the full claim text, detailed embodiments, dependent-claim limitations, or the complete technical description. It also does not establish the detailed figures or omitted portions of the specification.
Generated 10/1/2026, 9:53:42 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 6907142. 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.