06112186 is referenced by 612 patents and cites 21 patents.

A system for facilitating exchange of user information and opinion using automated collaborative filtering includes memory elements for storing item profiles and user profiles. The data contained in those profiles is used to calculate a number of similarity factors representing how closely the preferences of one user correlate with another. The similarity factors are evaluated to select a set of neighboring users for each user which represents the set of users which most closely correlate with a particular user. The system assigns a weight to each one of the neighboring users. The system uses the ratings given to items by those neighboring users to recommend an item to a user. The system may be distributed, i.e. the system may include a number of nodes connected to a central server. The central server includes a memory element for storing user profile data and the nodes may be the type of system described above.

Title
Distributed system for facilitating exchange of user information and opinion using automated collaborative filtering
Application Number
597442
Publication Number
6112186
Application Date
March 31, 1997
Publication Date
August 29, 2000
Inventor
James J Sullivan
Arlington
MA, US
Jonathan Ari Sheena
Cambridge
MA, US
David Henry Ritter
Boxborough
MA, US
Max E Metral
Boston
MA, US
Christopher P Bergh
Lexington
MA, US
Agent
Michaelson & Wallace
Agent
Peter L Michaelson
Assignee
Microsoft Corporation
WA, US
IPC
G06F 17/60
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