Erwin; John R.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Erwin; John R..The latest application filed is for "board game apparatus".
- Erwin; John R. - Los Angeles CA
- Erwin; John R. - Paradise Valley AZ
- Erwin; John R. - Cincinnati OH
| Patent | Date |
|---|---|
| Board game apparatus Grant 4,377,287 - Erwin March 22, 1 | 1983-03-22 |
| Racquetball racquet Grant D260,415 - Erwin , et al. August 25, 1 | 1981-08-25 |
| Method of manufacturing a tennis racket Grant 4,264,389 - Staub , et al. April 28, 1 | 1981-04-28 |
| Tennis racket manufacture Grant 4,183,776 - Staub , et al. * January 15, 1 | 1980-01-15 |
| Method and apparatus for controlling tip vortices Grant 3,997,132 - Erwin December 14, 1 | 1976-12-14 |
| Method Of Making A Fiber Reinforced Racket Grant 3,755,037 - Erwin , et al. August 28, 1 | 1973-08-28 |
| Turbomachinery Blade Grant 3,694,104 - Erwin September 26, 1 | 1972-09-26 |
| Compressor For Handling Gases At Velocities Exceeding A Sonic Value Grant 3,692,425 - Erwin September 19, 1 | 1972-09-19 |
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