Invalidity dossier
US 6119236
Intelligent network security device and method
Current assignee: ENHANCED SECURITY RESEARCH LLC
Added 9/23/2026, 7:37:48 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 — US 6,119,236
Title: Intelligent network security device and method
Patent number: US6119236A. Application number: US09/210,057. Inventor: Peter M. Shipley. Original assignee: Individual. Current assignee (as listed, with the source's own caveat that listed assignees may be inaccurate): ENHANCED SECURITY RESEARCH LLC; SHIPLEY/LAWFINANCE GROUP PATENT JUSTICE LLC.
Prior art date: 1996-10-07. Filing date: 1998-12-10. Publication/grant date: 2000-09-12. Status: Expired – Lifetime; anticipated expiration 2016-10-07.
Purpose: The invention relates to computer security, specifically preventing unauthorized intrusion into computer networks and systems. Its predominant current usage is described as the interface between local area networks and the internet. The preferred embodiment is an intelligent network security device residing within a computer local area network that examines information communicated within the network—in an Ethernet system, examining data packets to recognize suspicious patterns of behavior. The device is connected to control a firewall so that unauthorized or disruptive outside users are blocked from accessing the network.
Plain-language scope: Blocking occurs in several degrees keyed to the assigned seriousness of a breach attempt, so that less serious perceived attempts are allowed to continue communicating with the network at some level, or to resume communications after a period of time. These graduated responses aim to avoid absolute banishment for inadvertent improprieties. Stated advantages: each specific type of breach attempt need not be known and anticipated; minimal interference with normal network traffic; compatibility with existing computers, networks, and peripheral hardware; and no dependence on knowing the exact network configuration or user inventory. Classifications include H04L63/02 (firewalls), H04L63/1416 (attack signature detection), H04L63/1441 (countermeasures), and H04L63/0263 (rule management).
What the excerpt does not establish: It does not supply the full specification, the actual claims, the detailed figures, or the complete prior-art discussion. It therefore does not establish claim scope.
Generated 10/1/2026, 9:41:54 PM
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Litigation summary
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Proceedings on file (0)
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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.