Invalidity dossier
US 10334280B2
Added 10/28/2026, 12:01:07 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 — US10334280B2
Title: Image coding method, image coding apparatus, image decoding method and image decoding apparatus
Assignee/Applicant: Tagivan II LLC (listed as original and current assignee; the source cautions that assignee listings may be inaccurate and that it performed no legal analysis).
Key dates: Priority date 2011-11-07 (described as an assumption, not a legal conclusion); application US15/623,588 filed 2017-06-15; published as US20170289578A1 on 2017-10-05; granted 2019-06-25; anticipated expiration 2032-11-06. Legal status is listed as "Active."
Inventors: Hisao Sasai, Takahiro Nishi, Youji Shibahara, Toshiyasu Sugio, Kyoko Tanikawa, Toru Matsunobu, Kengo Terada.
Purpose: The patent addresses arithmetic coding and decoding in image/video compression (e.g., H.264/MPEG-4 AVC and emerging standards such as the JCT-VC HEVC working draft). In the described background, quantized coefficients of a block are scanned in a predetermined order and information indicating the position of the last non-zero coefficient in that scan order ("last position information") is binarized and coded using context-adaptive binary arithmetic coding/decoding. The stated aim is to arithmetically code and decode this last position information "using a context which is appropriately switched among a plurality of contexts."
Plain-language scope: Per the described general aspect, the method binarizes last position information into either (i) a binary signal containing a first signal no longer than a predetermined maximum length and no second signal, or (ii) a first signal of the maximum length plus a second signal. Each binary symbol of the first signal is arithmetically coded with a context selected according to its bit position; the second signal, when present, is coded using a fixed probability. When the first signal reaches the maximum length, the binary symbol at its last bit position is coded using a context exclusive to that position.
Source: https://patents.google.com/patent/[US10334280](/patent/US10334280)/en
Not established by this excerpt: The full claim set, dependent-claim limitations, the complete specification, drawings (FIGS. 1–8B are listed but not reproduced), embodiments beyond the summary aspect, and the specific prior-art references discussed (only Non Patent Literature 1/2 and JCTVC-F803 are named, without full citations). The excerpt also does not establish prosecution history, claim scope as construed, or the accuracy of the legal-status and assignee data.
Generated 10/28/2026, 12:01:19 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 10334280B2. 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.