David M. Robey

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Alexandria, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Tennis teaching device and method
- Patent number 5,222,732
- Issue date Jun 29, 1993
- Lasker; R. J.
- David M. Robey
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Tennis stroke practice apparatus
- Patent number 5,056,785
- Issue date Oct 15, 1991
- Lasker; R. J.
- David M. Robey
- A63 - SPORTS GAMES AMUSEMENTS