Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876900 | Racket string tension tester | William P. Carney | 1989-10-31 |
| 4794805 | Tennis racket string tension tester | William P. Carney | 1989-01-03 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876900 | Racket string tension tester | William P. Carney | 1989-10-31 |
| 4794805 | Tennis racket string tension tester | William P. Carney | 1989-01-03 |