Invalidity dossier
US 7245928
Method and system for improved short message services
Current assignee: Sierra Wireless America Inc
Added 9/23/2026, 7:17:03 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: US 7,245,928 B2
Title: Method and system for improved short message services
Patent number: US7245928B2
Application number: US10/885,445 (filed 2004-07-06)
Publication date (grant): 2007-07-17
Priority date: 2000-10-27 (claimed from US09/699,312, patent US6856808B1)
Inventor(s): Edward I. Comer; Bryan Keith Tarleton; Michael J. Criscolo; William George Simitses
Original assignee: Cellemetry LLC
Current assignee listed: Sierra Wireless America Inc
Legal status listed: Expired – Fee Related (anticipated expiration 2020-10-27)
Source: https://patents.google.com/patent/US7245928/en
Purpose and plain-language scope (as supported by the excerpt):
The patent relates to exchanging short messages between a telemetry gateway and a remote location, and specifically to "eliminating the delays associated with communicating short messages using of a short message switching center" (Definitions, quoting the source). The excerpt situates the invention in digital wireless telecommunications, where Short Message Service (SMS) is described as an inherent capability, and where radio technologies (TDMA, CDMA, GSM) are technically incompatible at the radio layer but largely compatible at the intersystem SS7 transport layer, with many messaging details being implementation-specific.
The excerpt's definitional material also describes related background concepts: short message service center (SMSC) platforms and their protocol-specific limitations; format converters that bi-directionally convert between data formats (e.g., X.50 to ISDN); subscriber access to messages across voice mail, e-mail, facsimile, telephone, pager, cellular, and PDA systems; an intelligent signaling transfer point (ISTP) with a database for call processing control information; and a data collection device usable with TDMA, CDMA, FDMA, and related formats.
What the excerpt does not establish:
The supplied text is excerpted and does not include the claims, the full written description, or the drawings. It therefore does not establish the specific claimed subject matter, claim scope, or claim limitations. It also does not establish the detailed operation of the telemetry gateway, how delays are eliminated, or the precise role of any short message switching center. Consistent with your instructions, no litigation, ownership-transfer history beyond the listed assignments, validity, or prior-art conclusions are addressed here.
Generated 10/1/2026, 9:42:12 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)
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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.