Invalidity dossier
US 7809996
Adaptive FEC codeword management
Current assignee: Adaptive Spectrum and Signal Alignment, Inc.
Added 9/24/2026, 12:48:06 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 — US7809996B2
Title: Adaptive FEC codeword management
Source: https://patents.google.com/patent/[US7809996](/patent/US7809996)/en (fetched 2026-09-24)
Key bibliographic data (per supplied excerpt):
- Patent number: US7809996B2
- Application number: US12/185,729
- Inventor: John M. Cioffi
- Original assignee / current assignee listed: Adaptive Spectrum and Signal Alignment Inc.
- Priority date: 2003-12-07
- Filing date: 2008-08-04
- Publication date: 2010-10-05 (grant)
- Prior publication: US20090086800A1, published 2009-04-02
- Legal status as listed: Expired – Lifetime, adjusted expiration 2024-09-29
- Classifications include H04L1/00, H04L1/004, H04L1/0057, H04L1/0009, H04L1/0019, H04B3/32, H04L41/14 and H04L43/08.
Purpose / plain-language scope (grounded only in supplied text): The title and classification data indicate a system and method for adaptively managing forward-error-correction (FEC) codewords in digital transmission. Class placement ties the subject matter to error detection/prevention using block codes, adaptation of channel coding and transmission rate to link quality, statistical/mode-switching adaptation strategies, interleaving, crosstalk reduction, and network analysis/monitoring of data switching networks. The listed "prior art keywords" — controller, MEVs, transmission, data, analyzing — suggest the disclosure involves a controller analyzing measurement/error values relating to a transmission channel and adjusting FEC codeword parameters accordingly. The excerpt contains no verbatim claim text, so the precise claimed scope cannot be stated.
What this excerpt does not establish:
- It contains no claim language, so the exact metes and bounds of the claims are unknown.
- It provides no description, embodiments, figures, or specification text.
- It does not establish validity, enforceability, patentability, or the content or relevance of any prior art.
- Bibliographic labels such as "current assignee" and legal-status/expiration entries are expressly flagged in the source as assumptions, not legal conclusions.
The source lists litigation and reassignment events; consistent with the instructions, these are not analyzed here and are excluded from this overview.
Generated 10/1/2026, 9:31:50 PM
Cases on file (1)
Group view →Specific litigation cases in our database that name US patent 7809996. The free-form analysis below may also discuss cases beyond this list.
- Adaptive Spectrum and Signal Alignment, Inc. v. AT&T Inc. et al.filed Jan 19, 20242:24-cv-00029U.S. District Court for the Eastern District of Texas, Marshall Divisionterminated Apr 14, 2025dismissed - settled
Defendants: AT&T Inc., AT&T Corp., AT&T Communications, LLC, and 3 others
Other patents asserted: 7593458, 7428669, 7991122, 9954631, 10848398, 11050654, 11477108, 11770313
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.
Current assignee: Adaptive Spectrum and Signal Alignment, Inc.
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.
Keep exploring
More patents asserted by Adaptive Spectrum and Signal Alignment, Inc.
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This patent in court (1)
1 tracked lawsuit name US 7809996.