Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4914780 | Compound counterbalance and winding systems with zero torque spirals | Tracy G. Rogers | 1990-04-10 |
| 4854077 | Fail-safe tip-lock shoe | Tracy G. Rogers, John H. Moran | 1989-08-08 |