Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802306 | Automatic, gravity-powered closure device | — | 1989-02-07 |
| 4799331 | Automatic, gravity-powered closure device | — | 1989-01-24 |
| 4607397 | Portable hard hat | — | 1986-08-26 |
| 4443029 | Tubular clamp assembly | — | 1984-04-17 |
| 4335987 | Apparatus for vertically stacking flat weights | — | 1982-06-22 |
| 4197653 | Electronic sextant | — | 1980-04-15 |
| 4197806 | Selective weight release | — | 1980-04-15 |