Invalidity dossier
US 7801118
Fibre channel switching fabric port control
Current assignee: Avago Technologies International Sales Pte Ltd
Added 9/23/2026, 5:56:18 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 — US7801118B2
Title: "Fibre channel switching fabric port control"
Patent number / application: US7801118B2; Application US11/147,113, filed 2005-06-06.
Inventor / assignee: Inventor Stuart B. Berman. Original assignee Emulex Design and Manufacturing Corp; current assignee listed as Avago Technologies International Sales Pte Ltd.
Key dates: Priority date 1997-02-18; filed 2005-06-06; published as US20050226260A1 on 2005-10-13; granted 2010-09-21; adjusted expiration 2019-02-16; status "Expired – Fee Related."
Purpose and plain-language scope (per the excerpt): The patent concerns control of ports in a Fibre Channel switching fabric. The excerpt identifies prior-art keywords—frame, route, port, fabric, signal—indicating subject matter directed to how frames are routed and how ports in the fabric are governed. Classifications include packet switching elements (H04L49/00), peripheral/input-output ports (H04L49/30), routing and path finding including route fault recovery (H04L45/00, H04L45/28), address table lookup/filtering (H04L45/745), flow control and QoS/priority traffic (H04L47/10, H04L47/24), and optical fault recovery (H04B10/03). Read together, these indicate a switching-fabric port-control scheme involving frame routing, port units, address lookup, flow control, and fault recovery.
Prosecution/assignment history noted: Reassignments recorded (Emulex Design & Manufacturing, Vixel Corporation, Arcxel Technologies, Emulex Corporation, Avago entities), a later priority to US12/886,448 (which led to US8270396B2), and a Darts-ip patent-family litigation flag. These are recorded from the excerpt but are not analyzed here.
What the excerpt does not establish: It contains no claims, no detailed description, no drawings, and no prior-art references; therefore the specific claimed scope, limitations, embodiments, and cited prior art cannot be stated. The title, classifications, and keywords alone do not define the invention's metes and bounds. Nothing here establishes validity, infringement, or the accuracy of any listed assignee or date beyond what the source records.
Source: https://patents.google.com/patent/[US7801118](/patent/US7801118)/en
Generated 10/1/2026, 9:43:10 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 7801118. The free-form analysis below may also discuss cases beyond this list.
No cases on file mention this patent. Upload a CSV or add a case manually in Admin → Manage litigation cases.
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.