06041311 is referenced by 549 patents and cites 39 patents.

A method for recommending items to users using automated collaborative filtering stores profiles of users relating ratings to items in memory. Profiles of items may also be stored in memory, the item profiles associating users with the rating given to the item by that user or inferred for the user by the system The user profiles include additional information relating to the user or associated with the rating given to an item by the user. Similarity factors with respect to other users, and confidence factors associated with the similarity factors, are calculated for a user and these similarity factors, in connection with the confidence factors, are used to select a set of neighboring users. The neighboring users are weighted based on their respective similarity factors, and a rating for an item contained in the domain is predicted. In one embodiment, items in the domain have features. In this embodiment, the values for features can be clustered, and the similarity factors incorporate assigned feature weights and feature value cluster weights.

Title
Method and apparatus for item recommendation using automated collaborative filtering
Application Number
597442
Publication Number
6041311
Application Date
January 28, 1997
Publication Date
March 21, 2000
Inventor
John E McNulty
Burlington
MA, US
Yezdezard Z Lashkari
Cambridge
MA, US
Alexander Chislenko
Cambridge
MA, US
Agent
Michaelson & Wallace
Agent
Peter L Michaelson
Assignee
Microsoft Corporation
WA, US
IPC
G06F 17/30
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