Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5082279 | Liquid filled golf club | Harold L. Hull | 1992-01-21 |
| 5056778 | Liquid filled dumbbell | Harold L. Hull | 1991-10-15 |
| 4986535 | Variable weight exercise device | Harold L. Hull | 1991-01-22 |