Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5910032 | Marine propulsion system | David J. Gruenwald | 1999-06-08 |
| 4597692 | Rehabilitated manhole cover | — | 1986-07-01 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5910032 | Marine propulsion system | David J. Gruenwald | 1999-06-08 |
| 4597692 | Rehabilitated manhole cover | — | 1986-07-01 |