Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7866672 | Skate propulsion mechanisms | — | 2011-01-11 |
| 7651419 | Handle providing shock absorption | — | 2010-01-26 |
| 7600437 | Devices for measuring strings of a racket and ball quality | — | 2009-10-13 |
| 7578065 | Devices for determining the string tension of racket strings | — | 2009-08-25 |
| 4911441 | Apparatus for controlling moves of a ball-hitting instrument in ball games | — | 1990-03-27 |
| 4846002 | Racket-stringing tester | — | 1989-07-11 |