Invalidity dossier
US 11044772
Added 10/14/2026, 12:01:12 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US11044772B2
Title: Associated device discovery in IMS networks
Patent number / application: US11044772B2; application US16/945,775; filed 2020-07-31; granted 2021-06-22.
Assignee: Aylus Networks Inc (current and original assignee, per the listing).
Inventors: Shamim A. Naqvi, Prasad S. Dorbala, Ellis L. Wong, Mahesh N. Ganmukhi.
Priority: 2005-06-24 (claimed from US11/166,407, which the source links to US7792528B2), with a further priority claim from US11/282,924 (2005-11-18).
Legal status: Expired – Lifetime; anticipated expiration 2025-06-24. (The source notes legal status is an assumption, not a legal conclusion.)
Purpose / plain-language scope: The supplied text frames the invention as relating generally to IP Multimedia Subsystem (IMS) networks and, more specifically, to IMS users who use — perhaps multiple — discovered user endpoint devices. The background explains that IMS networks support both voice and data services, that mobile handsets connect to a Base Transceiver Station via a Radio Access Network (e.g., CDMA or GSM), that the RAN connects through BSCs to MSCs and to the PLMN/PSTN via a GMSC, and that 2.5G/3G multimedia services maintain an IP context while a handset is powered on and connected. It also notes that the connection between service logic and the application server is a "stateful" connection that must be maintained for the duration of the service, and describes the PCF packetizing RAN traffic and MGW/soft-switch arrangements carrying both circuit- and packet-switched traffic.
Classifications include H04L65/1016 (IMS), H04W76/15 (multiple wireless link connections setup), H04W88/06 (multi-mode terminals), and H04W84/18 (self-organising/ad-hoc networks), consistent with associated-device discovery.
Source: https://patents.google.com/patent/[US11044772](/patent/US11044772)/en
What this excerpt does not establish: It does not set out the claims, the written description, or the specific mechanisms/steps of discovery; it does not provide the full specification (the text is expressly an excerpt). It also does not establish litigation, ownership transfers, validity, or prior art, and no such analysis is offered here.
Generated 10/14/2026, 12:02:17 PM
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Litigation summary
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Proceedings on file (0)
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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
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.