Invalidity dossier
US 6005856
Communication protocol for spread spectrum wireless communication system
Current assignee: Intel Corp
Added 9/23/2026, 9:40:07 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 — US 6005856A
Title: Communication protocol for spread spectrum wireless communication system
Patent number: US 6005856A
Application number: US08/668,483
Inventors: Ryan N. Jensen, Charles L. Lindsay, Claude M. Williams
Original assignee: Omnipoint Corp. (current assignee listed as Intel Corp)
Priority date: 1993-11-01 (claimed from US08/284,053)
Filing date: 1996-06-21
Publication/grant date: 1999-12-21
Legal status: Expired – Lifetime (anticipated expiration 2013-11-01)
Classification: H04W74/04 and H04W74/06 (scheduled access; scheduled access using polling); H04B7/2618 (hybrid CDMA-TDMA); G10L19/012 (comfort noise or silence coding)
Purpose and plain-language scope: The patent concerns a communication protocol for a spread spectrum wireless communication system, with prior-art keywords "base station," "time," "spread," "spectrum," and "station." The classification and keyword data indicate a cellular/mobile communication scheme using hybrid code-time division multiple access, in which channel access is scheduled and may involve polling. The abstract-related terms reference periodic, cellular communication. The description reportedly addresses spreading, synchronization, transitions, signaling, measurement, handoff-related quality metrics, and mobile communication. No verified claim text or abstract appears in the supplied excerpt, so the precise scope of the claims is not established.
Source: https://patents.google.com/patent/[US6005856](/patent/US6005856)/en
What the excerpt does not establish: The supplied text contains no claim language, no full abstract, and no description body; therefore claim scope, specific protocol steps, embodiments, and figures cannot be confirmed from it. Asserted relationships to other applications (e.g., US08/284,053, US09/407,008, US10/446,609, WO1997049200A1) are listed as bibliographic data only and are not verified here. Dates, assignees, and legal status are stated as assumptions by the source, not legal conclusions. Non-U.S. family members are identified solely by the listed publication numbers.
Generated 10/1/2026, 9:34:07 PM
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Litigation summary
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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.