Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5277082 | Guide shoe assembly and method of production | — | 1994-01-11 |
| 5131587 | Combined calendar and envelope assembly | — | 1992-07-21 |
| 4367874 | Tennis racquet and method of making same | Norman T. Staub, John R. Erwin | 1983-01-11 |
| D260415 | Racquetball racquet | John R. Erwin, Norman T. Staub | 1981-08-25 |
| 4264389 | Method of manufacturing a tennis racket | Norman T. Staub, John R. Erwin | 1981-04-28 |
| 4183776 | Tennis racket manufacture | Norman T. Staub, John R. Erwin | 1980-01-15 |