Invalidity dossier
US 5815492
Dynamic bandwidth estimation and adaptation in high speed packet switching networks
Current assignee: Cisco Technology Inc
Added 9/23/2026, 1:45:57 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 — US5815492A
Title: Dynamic bandwidth estimation and adaptation in high speed packet switching networks
Patent number: US5815492A
Application number: US08/807,499
Filing date: 1997-02-27
Priority date: 1996-06-20
Publication (grant) date: 1998-09-29
Inventor(s): Jean-Marc Berthaud; Pierre-Andre Foriel; Claude Galand; Stephane Lengelle; Laurent Nicolas
Original assignee: International Business Machines Corp
Current assignee listed: Cisco Technology Inc
Legal status listed: Expired – Lifetime (anticipated expiration 2017-02-27)
Purpose (from the supplied text): The invention "relates to traffic management in high speed transmission networks, in particular to a method and system for monitoring traffic, for filtering traffic measurement and dynamically adjusting bandwidth allocated to connections." The text notes that in high speed networks, nodes "must provi[de]" (excerpt truncated at that point).
Plain-language scope: Per the supplied text, the patent addresses monitoring traffic in high speed packet switching networks, filtering traffic measurements, and dynamically adjusting the bandwidth allocated to connections. Classifications identify it as relating to packet switching systems, ATM (Transfer Mode Dependent) bandwidth control, and network analysis using statistical or mathematical methods.
Source: https://patents.google.com/patent/[US5815492](/patent/US5815492)/en
What the excerpt does not establish:
- It does not include the full claims, detailed description, or abstract, so the precise claimed scope cannot be verified from this text alone.
- It does not identify specific prior-art references relied upon during prosecution.
- It does not establish the accuracy of the legal status, assignee listing, or dates; the source itself characterizes these as assumptions or disclaims legal analysis, and states the listed assignees "may be inaccurate."
- It provides only a truncated sentence regarding node requirements, so the full purpose statement is incomplete.
Per operating rules, I do not address litigation, ownership-transfer validity, or prior art here, and I have not added facts beyond the supplied excerpt.
Generated 10/1/2026, 9:52:51 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.