Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37519 | Golf club with optical alignment system | Derek Decker | 2002-01-22 |
| 6071202 | Golf swing training method | Derek Decker | 2000-06-06 |
| 5800279 | Detachable training system for golf clubs | Derek Decker | 1998-09-01 |
| 5673338 | System for verification of unique items | Stuart Denenberg, Robert N. Petersen, John J. Christensen | 1997-09-30 |
| 5640777 | Golf club with optical alignment system | Derek Decker | 1997-06-24 |
| 5521984 | System for registration, identification and verification of items utilizing unique intrinsic features | Stuart Denenberg, Robert N. Petersen, John J. Christensen | 1996-05-28 |