Invalidity dossier
US 5903832
Mobile terminal having enhanced system selection capability
Current assignee: Nokia Technologies Oy
Added 9/23/2026, 10:43:48 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 — US5903832A
Title: Mobile terminal having enhanced system selection capability
Patent number / application: US5903832A; Application US08/576,260
Inventors: Jorma Seppanen, Juha Vaihoja, Mikko Lietsalmi, Jaakko Vanttila
Assignee: Original assignee Nokia Mobile Phones Ltd; current assignee listed as Nokia Technologies Oy (per supplied text).
Key dates: Priority/filing date 1995-12-21; granted/publication date 1999-05-11; anticipated expiration 2015-12-21. Legal status shown as "Expired – Lifetime."
Classifications: H04W48/18 (selecting a network or communication service); H04W8/18 / H04W8/183; H04W88/06 (multi-mode terminals).
Purpose (plain language, from the excerpt): A mobile terminal (e.g., a cellular radiotelephone) can operate across many networks — public cellular A-system/B-system, residential (RCT), and private/non-public types such as Wireless Business Systems, Limited Service Areas, and Residential Cellular Telephones. The patent organizes selection of these networks so the user can reach a desired network or service with minimal effort.
Scope as described: The mobile station maintains a single prioritized list of all available networks — public, private, and residential — with access provided three ways: (1) automatic access requiring little or no user involvement; (2) access to a user-specified network; and (3) access to a user-specified service (e.g., data, fax, e-mail) supported by at least one network. The terminal can search for additional networks, including those supporting a particular service type or services not already represented in the list, and can search all networks at once for easy selection. Default priority order is residential, private, public; priority is user-programmable by moving network names up or down via the keypad and display. Home area has highest priority, then home-type, then non-home networks; private networks are not selected unless programmed. Numeric PSIDs/RSIDs and SIDs are used for selection, while alphanumeric "Alpha Tags" are shown to users.
What the excerpt does not establish: It does not establish claim scope, validity, enforceability, litigation, ownership-transfer effects, or prior-art distinctions, and it does not show the full text of any claim.
Source: https://patents.google.com/patent/[US5903832](/patent/US5903832)/en
Generated 10/1/2026, 9:33:12 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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