Invalidity dossier
US 7929902
Virtual wireless multitrack recording system
Current assignee: Zaxcom Inc
Added 9/23/2026, 6:31:35 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 — US7929902B1
Title: Virtual wireless multitrack recording system
Patent number: US7929902B1
Application number: US11/404,735
Assignee: Zaxcom Inc (original and current assignee per the supplied text)
Inventors: Glenn Norman Sanders; Howard Glenn Stark
Priority date: 2005-07-14 (claimed from US11/181,062)
Filing date: 2006-04-14
Publication/grant date: 2011-04-19
Status: Active; adjusted expiration 2028-08-22
Purpose and plain-language scope (as far as the excerpt shows):
The title and prior-art keywords indicate a system for recording multiple audio tracks wirelessly, where local audio data is associated with a local identifier. The excerpt does not include the abstract, claims, or detailed description, so the precise scope cannot be stated from the supplied text. No claim language is available to define the invention's boundaries.
Classification signals (from the supplied text): G06F16/60 and G06F16/63 (retrieval/database structures for audio data and querying); G08C25/00 and G08C25/02 (error prevention/correction and monitoring arrangements in measured-value transmission systems). These classifications suggest error monitoring and audio-data handling, but the excerpt gives no explanation of their relevance.
What the excerpt does not establish:
- The actual claims, independent or dependent, and therefore the legal scope of the invention.
- The abstract or summary of the invention.
- Any prior-art references cited or applied during prosecution.
- The content of related family members or continuations.
- Any litigation, ownership transfer, or validity conclusion (excluded per instructions; the source lists case URLs but these are not analyzed here).
Source: https://patents.google.com/patent/[US7929902](/patent/US7929902)/en
Generated 10/1/2026, 9:42:43 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 7929902. The free-form analysis below may also discuss cases beyond this list.
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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.