Invalidity dossier
US 5751715
Accelerator fiber channel hub and protocol
Current assignee: Avago Technologies International Sales Pte Ltd
Added 9/23/2026, 3:03:39 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
US 5,751,715 A — Patent Overview
Title: Accelerator fiber channel hub and protocol
Patent number: US 5,751,715 A
Application number: US 08/695,290
Inventors: Kurt Chan; Alistair D. Black
Original assignee: Gadzoox Microsystems Inc.
Current assignee (per source listing): Avago Technologies International Sales Pte Ltd
Priority/filing date: 1996-08-08
Publication (grant) date: 1998-05-12
Status: Expired – Lifetime; anticipated expiration recorded 2016-08-08.
Purpose and plain-language scope
The source excerpt identifies the invention as an "accelerator fiber channel hub and protocol." The classification shown is H04L49/00 (packet switching elements), placing it in digital-data transmission and switching. The prior-art keywords listed — "hub port," "node," "subloop," "primitive," and "opn" (open) — indicate the disclosure concerns a fiber channel hub that connects nodes through hub ports, organizes them into subloops, and exchanges primitives and open (OPN) signaling under a defined protocol. The title's "accelerator" suggests the hub/protocol is directed at improving or speeding connection handling among attached nodes.
Accessible details from the source also show a related later-filed application (US 09/074,992, priority 1998-05-08, publishing as US 6,192,054 B1) and a chain of recorded reassignments: to Gadzoox Networks, Inc. (2003), to Broadcom Corporation (2003), a Bank of America security-interest filing (2016), and to Avago Technologies General IP (Singapore) Pte. Ltd. (2017). These are recorded assignments only; the source states its legal-status and assignee listings are assumptions, not legal conclusions.
Source: https://patents.google.com/patent/US5751715/en
What the excerpt does not establish
The supplied text contains no claims, abstract, description, or drawings. It therefore does not establish the specific claimed scope, the actual protocol steps, hub architecture, or how "acceleration" is achieved. It also does not establish validity, enforceability, claim interpretation, litigation history, or the substantive content of any cited prior art. The title alone should not be read as a complete statement of the invention.
Generated 10/1/2026, 9:51:48 PM
Cases on file (0)
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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.