Steven S. Ritchie

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Carpentersville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Automatic replay control system and method for amusement devices
- Patent number 4,685,677
- Issue date Aug 11, 1987
- Williams Electronics, Inc.
- Lawrence E. Demar
- G07 - CHECKING-DEVICES
Information Patent Grant
Bi-level pinball machine providing interlevel ball travel
- Patent number 4,606,545
- Issue date Aug 19, 1986
- Williams Electronics, Inc.
- Steven S. Ritchie
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Pinball machine having magnetic ball control
- Patent number 4,373,725
- Issue date Feb 15, 1983
- Williams Electronics, Inc.
- Steven S. Ritchie
- A63 - SPORTS GAMES AMUSEMENTS