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Steven S. Ritchie
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Chicago, IL, US
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Patents Grants
last 30 patents
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Patent Grant
Game playfield mounting system
Patent number
5,536,082
Issue date
Jul 16, 1996
Williams Electronics Games, Inc.
Steve Ritchie
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Magnetic ball lock for a pinball game
Patent number
5,415,403
Issue date
May 16, 1995
Williams Electronics Games, Inc.
Steve Ritchie
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Below the playfield ball delivery system for a pinball game
Patent number
5,350,174
Issue date
Sep 27, 1994
Williams Electronics Games, Inc.
Steve Ritchie
A63 - SPORTS GAMES AMUSEMENTS
Information
Patent Grant
Trigger handle switch for pinball type games
Patent number
D335150
Issue date
Apr 27, 1993
Williams Electronics Games, Inc.
Carl A. Biagi
D21 - Games, toys, and sports goods
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Patent Grant
Oscillating ball cannon
Patent number
5,186,462
Issue date
Feb 16, 1993
Williams Electronics Games, Inc.
Carl Biagi
A63 - SPORTS GAMES AMUSEMENTS