Invalidity dossier
US 11677940
Method and device for encoding/decoding image, and recording medium having stored bitstream
Current assignee: Intellectual Discovery Co Ltd
Added 10/17/2026, 12:01:15 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US11677940B2
Title: Method and device for encoding/decoding image, and recording medium having stored bitstream
Patent Number: US11677940B2
Application Number: US16/648,470
Dates:
- Priority date: 2017-09-20
- Filing date: 2018-09-20
- Publication date (grant): 2023-06-13
- Adjusted expiration: 2039-01-15
- Status: Active
Assignees:
- Original assignee: Electronics and Telecommunications Research Institute
- Current assignee: Intellectual Discovery Co., Ltd.
Inventors: Sung Chang Lim, Jung Won Kang, Hyun Suk Ko, Jin Ho Lee, Ha Hyun Lee, Dong San Jun, Hui Yong Kim
Purpose and Plain-Language Scope:
The supplied text identifies this as a patent directed to methods and devices for encoding and decoding images, plus a recording medium storing a bitstream. Its classifications place it in digital video coding (H04N19/00 family) with emphasis on adaptive coding, block subdivision (H04N19/119, "subdivision of a picture into rectangular or non-rectangular coding blocks"), entropy coding (H04N19/13), and syntax aspects related to video coding standards (H04N19/70). The listed "prior art keywords" — splitting, block, size, tree, split — indicate the disclosed subject matter concerns splitting of blocks and tree-based block-size structures. Classification H04N19/176 points to the coding unit being an image region/block (e.g., macroblock), and H04N19/1883 to sub-band/hierarchical structures.
Missing from the excerpt: the abstract, claims, and detailed description. Based only on the supplied text, the precise technical scope cannot be established.
Source: https://patents.google.com/patent/[US11677940](/patent/US11677940)/en
What this excerpt does not establish:
- The specific claims or claim scope.
- The abstract or detailed description content.
- Any prior-art comparison or validity assessment.
- Any litigation or legal conclusions (not researched per instructions).
- Technical details of the encoding/decoding method beyond classification and keyword hints.
Note: The excerpt states legal status and assignee information are assumptions, not legal conclusions.
Generated 10/17/2026, 12:01:21 AM
Cases on file (0)
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Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Proceedings on file (0)
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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.