Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7674186 | Direction and distance correcting golf putter | Sheldon S. Bitko, Robert A. Coon, John Piotrowski | 2010-03-09 |
| 6358162 | Golf putter with green-reading features | John Piotrowski, Sheldon S. Bitko | 2002-03-19 |
| 4381504 | Switch and alarm system responsive to sudden movement, angular tilt and vibration | — | 1983-04-26 |