John R. Madsen

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Richmond, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Bowling alley bumper system for producing visual effects
- Patent number 5,800,274
- Issue date Sep 1, 1998
- AMF Bowling, Inc.
- Kent Widrick
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Three-dimensional bowling alley masking unit
- Patent number 5,779,554
- Issue date Jul 14, 1998
- AMF Bowling, Inc.
- Winston T. Sanders
- A63 - SPORTS GAMES AMUSEMENTS