Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6155932 | Golf shaft for controlling passive vibrations | John B. Kosmatka, Frank M. Belknap | 2000-12-05 |
| 5928090 | Golf shaft for controlling passive vibrations | John B. Kosmatka, Frank M. Belknap | 1999-07-27 |