05917725 is referenced by 246 patents and cites 20 patents.

A tournament system for electronic games in which scores achieved on the games are transmitted to one or a hierarchy of computers in which a winner is determined. At least one computer stores a player code associated with player credits. The players insert credit cards into the games which read the player codes, send the codes to a computer, obtain verification signals from the computer and are thereby enabled. The computer also stores handicap values associated with players and/or the games, and modifies the scores by the handicap values. The computer can also download advertising, winner or other messages to specific ones or all the games for display, and can cause the games played to be modified or changed.

Title
Tournament data system
Application Number
749311
Publication Number
5917725
Application Date
May 24, 1995
Publication Date
June 29, 1999
Inventor
John A Klayh
Winnipeg
CA
John S Hancharyk
Winnipeg
CA
Mohamed A Barakat
Winnipeg
CA
Gary H Sumka
Oakville
CA
Kerry E Thacher
Winnipeg
CA
Agent
Antonelli Terry Stout & Kraus
Assignee
John Klayh
CA
IPC
G06F 17/161
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