Invalidity dossier
US 7643480
Added 10/31/2026, 4:01:12 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 7,643,380 B2
Title: Method and system for reliably and efficiently transporting data over a network
Patent number / application: US 7,643,380 B2; Application US 11/041,079
Inventors: Hain-Ching Liu; Ji Zhang; Jiangang Ding
Assignee: The supplied text lists "Individual" as original assignee, with later assignments to Silicon Valley Bank (2006), Software Site Applications, Limited Liability Company (2008), Intellectual Ventures I LLC (2013), Intellectual Ventures Assets 207 LLC (2026) and E2E Systems LLC (2026). The current assignee is listed as E2E Systems LLC.
Key dates: Priority date 2004-01-22; filing date 2005-01-21; publication of US 2008/0151881 A1 on 2008-06-26; grant/publication of US 7,643,380 B2 on 2010-01-05. Status is listed as active, with an adjusted expiration of 2028-02-18. (Dates are as stated in the source; the source itself notes they are assumptions, not legal conclusions.)
Purpose: According to the "Definitions" section, the invention relates to data transport and delivery over a network and, more specifically, to reliable delivery of media data over a potentially unreliable Internet Protocol network. The text explains that media delivery involves large payloads and stringent real-time constraints, requiring high bit rates and controlled delay and jitter, and that the TCP transport protocol is not designed for low-latency real-time delivery because it does not guarantee end-to-end delay jitter and latency.
Plain-language scope (as far as the excerpt shows): The disclosed approach involves servers sending media content and receivers receiving it, with state machines used to account for transmitted data blocks (whether in a server buffer, a receiver buffer, or in transit) and to maintain data ordering and handle lost or duplicate data. The excerpt was truncated before the claims, so the precise claim scope cannot be described here.
Classifications shown: H04N21/6375 (client control signals requesting retransmission of lost or corrupted packets), H04L1/1621 (group acknowledgement), H04L1/1829, H04L69/40 (protocol failure recovery) and related groups.
Not established by the excerpt: the actual claim language and limitations; the detailed embodiments and figures; the specific prior art cited or considered; and any conclusions about validity, infringement or enforceability. No litigation or ownership analysis is made here.
Source: https://patents.google.com/patent/[US7643480](/patent/US7643480)/en
Generated 10/31/2026, 4:01:51 AM
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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.