Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4625946 | Hoist having worm safety device | Charles W. Clark | 1986-12-02 |
| 4518153 | Safety mechanism for hoisting drums | Roger A. Johnson, Charles W. Clark | 1985-05-21 |
| 4270403 | Push-pull cable motor truck remote gear shift system and two-dimensional motion conversion and transmission apparatus therein | — | 1981-06-02 |