Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887540 | Watercraft propulsion system | — | 1989-12-19 |
| 4834364 | Exercise pole with cross members | Robert C. Gongwer | 1989-05-30 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887540 | Watercraft propulsion system | — | 1989-12-19 |
| 4834364 | Exercise pole with cross members | Robert C. Gongwer | 1989-05-30 |