Invalidity dossier
US 6345300
Method and apparatus for detecting a user-controlled parameter from a client device behind a proxy
Current assignee: Intel Corp
Added 9/21/2026, 9:27:20 AM
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 6,345,300 B1
Title: Method and apparatus for detecting a user-controlled parameter from a client device behind a proxy
Assignee: Intel Corp (original assignee; assignment recorded 1998-04-30)
Inventors: Bikram Singh Bakshi; Michael Man-Hak Tso
Application No.: US09/000,762
Priority date: 1997-03-25 | Filed: 1997-12-30 | Granted/Published: 2002-02-05
Status (per source): Expired – Lifetime; anticipated expiration 2017-12-30
Purpose: The patent addresses a problem created by firewalls and network proxies: when a client device behind a proxy sends a request, the proxy replaces the client's IP address with its own, so a remote proxy or content server "cannot determine the IP address of the client device that actually originated the request" and cannot reliably infer user-specific preferences. The invention lets a network device obtain a user-controlled parameter from a client residing behind a proxy — useful, for example, for customizing transcoding or scaling of downloaded content.
Plain-language scope: A network device receives a request originating from a client behind a proxy. If it lacks a record of user preferences for the request's IP address, it returns, instead of the requested object, a reply containing a query mechanism (e.g., JavaScript, VBScript, JScript, or Java). That embedded code checks for previously set preferences (e.g., a cookie), optionally prompts the user, and POSTs a message back containing the preference and the client device's IP address in the message body. The network device ignores the proxy's header IP address and uses the embedded body address to update its preference table, then retrieves and downloads the requested object according to the preference. Embodiments include a firewall proxy and a transcoding server with a transcoder, parser, transcode service providers, HTTP remote proxy, and server-side cache.
Not established by this excerpt: the full claim set and exact claim language; the complete specification and figures (Figs. 1–4 descriptions only partially included); the full reference list and prior art; and any litigation, ownership transfer, validity, or legal-status conclusions. Legal status shown is expressly an assumption, not a legal conclusion.
Generated 10/1/2026, 10:02:20 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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