John R. Erwin

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Paradise Valley, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Tennis racquet and method of making same
- Patent number 4,367,874
- Issue date Jan 11, 1983
- Starwin Industries, Inc.
- Anthony F. Staub
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Compressor diffuser and method
- Patent number 4,349,314
- Issue date Sep 14, 1982
- The Garrett Corporation
- John R. Erwin
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Racquetball racquet
- Patent number D260415
- Issue date Aug 25, 1981
- Starwin Industries, Inc.
- John R. Erwin
- D21 - Games, toys, and sports goods
Information Patent Grant
Method of manufacturing a tennis racket
- Patent number 4,264,389
- Issue date Apr 28, 1981
- Starwin Industries, Inc.
- Anthony F. Staub
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Tennis racket manufacture
- Patent number 4,183,776
- Issue date Jan 15, 1980
- Starwin Industries, Inc.
- Anthony F. Staub
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Glass fiber tennis racket frame
- Patent number 4,045,025
- Issue date Aug 30, 1977
- Starwin Industries, Inc.
- Anthony F. Staub
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Method and apparatus for controlling tip vortices
- Patent number 3,997,132
- Issue date Dec 14, 1976
- The Garrett Corporation
- John R. Erwin
- B64 - AIRCRAFT AVIATION COSMONAUTICS