Invalidity dossier
US 8478207
Added 9/23/2026, 12:17:59 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US8478207B2
Title: Data transfer between wireless devices
Patent number / application: US8478207B2; application US13/493,650; earlier publication US20120252512A1.
Inventors: Alan G. Carlton; Alexander Reznik.
Assignee: InterDigital Patent Holdings Inc (original and current assignee as listed).
Key dates: Prior art date 2008-12-23; filing date 2012-06-11; granted/publication date 2013-07-02; anticipated expiration 2029-12-22. Legal status listed as Active. Related later filings (US13/930,743, US14/251,383, US14/921,736, US15/393,735) claim priority to this application.
Purpose: The patent addresses file/data transfer between devices, which the background describes as a "cumbersome, multi-step task" with "fragmented" access and manipulation of files such as attachments, inhibiting spontaneous use. It seeks "a simplified and more intuitive approach to data transfer between devices."
Plain-language scope: The disclosure describes a method for controlling data communication in wireless communications in which a wireless transmit/receive unit (WTRU) detects environment information relating to at least one candidate WTRU operating in an associated local area. A user input is received via a user interface, relating to a selection of data for transfer and to an identified target WTRU. The user input and candidate-WTRU information are processed to identify at least one target WTRU from the candidates based in part on the user input. Candidate-WTRU information is solicited through a lower layer; environment information is used to identify the target WTRU, and transmission instructions are generated to enable transmission of data to that target WTRU. Figures describe a target discrimination algorithm, data communication between devices, physical layer security, and user-interface examples including a directional indication of a target device's location and transfer to multiple receiving devices.
Source: https://patents.google.com/patent/[US8478207](/patent/US8478207)/en
What the excerpt does not establish: It does not provide claim language, full specification text, or the exact number/scope of claims. It does not establish validity, enforceability, ownership transfers, or prior-art references. Any litigation note appears only as a database link, not as a verified legal conclusion.
Generated 10/1/2026, 9:53:41 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.