Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4660679 | Safety alarm tripod | — | 1987-04-28 |
| 4538703 | Climbing aid and safety descent system | J. Nigel Ellis | 1985-09-03 |
| 4511123 | Safety device | — | 1985-04-16 |
| 4489919 | Safety winch with disengageable drive | — | 1984-12-25 |
| 4458781 | Climbing aid and safety descent device | J. Nigel Ellis | 1984-07-10 |