Robert W. Van Naarden

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Hinkley, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Missed hit and player proximity detection system for electronic pro...
- Patent number 4,807,887
- Issue date Feb 28, 1989
- Industrial Design Electronic Assoc., Inc.
- Donald P. DeVale
- F41 - WEAPONS
Information Patent Grant
Dart game with two microcomputers
- Patent number 4,516,781
- Issue date May 14, 1985
- Industrial Design Electronic Associates, Inc.
- Donald P. DeVale
- F41 - WEAPONS