Invalidity dossier
US 5614898
Guide system
Current assignee: Aisin AW Co Ltd
Added 9/23/2026, 3:01:19 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 5,614,898 ("Guide System")
Bibliographic data (from the supplied excerpt): U.S. Patent No. 5,614,898; application No. 08/405,886; filed 1995-03-17; granted/published 1997-03-25. Inventors: Kazuo Kamiya, Hirofumi Morimoto, Shoji Yokoyama. Original assignee and current assignee: Aisin AW Co., Ltd. Priority date listed as 1994-03-18, with external priority claims to JP9346594A (1994-05-02), JP09346494A (1994-05-02) and JP6322022A (1994-12-26). Status shown as "Expired - Lifetime," with anticipated expiration 2015-03-17. Classifications include G01C21/34, G01C21/36 and G08G1/0969.
Purpose: The patent addresses guiding a vehicle's present position for sight-seeing information near the road being travelled, and seeks to provide guidance even for objects that do not face the road.
Plain-language scope: The system includes guide data storage for objects along a road and its area; present-position detecting means that traces the vehicle; and guide output means with two searches—a first search range based on the detected present position and a second, larger range encompassing the first. A manual key commands use of the second search in place of the first, and guidance information for located objects is read out and output (voice and picture/map displays are described). Guidance may be output sequentially from closest objects or by preset priority, and the description distinguishes a "guidance object" (subject of guidance) from a "shown object" (one already guided).
What the excerpt does not establish: It is expressly an excerpt with text omitted; it does not supply the full claims, abstract or complete description, so claim scope cannot be verified. It does not establish the accuracy of the listed priority/legal-status assumptions (Google states these are not legal conclusions), whether claims were amended or survived examination, or the content of the family members. No litigation, ownership-transfer, validity or prior-art findings are addressed here.
Generated 10/1/2026, 9:51:49 PM
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Litigation summary
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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
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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.