Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11480130 | Parabolic combustion engine | — | 2022-10-25 |
| 11053883 | Parabolic combustion engine | — | 2021-07-06 |
| 10590883 | Parabolic combustion engine | — | 2020-03-17 |
| 10352267 | Parabolic combustion engine | — | 2019-07-16 |
| D291870 | Combined light and speaker housing for an emergency vehicle | Sigmund Urbanski, Edward S. Stanuch | 1987-09-15 |
| D267000 | Power driven ski vehicle | Charles Stewart | 1982-11-23 |
| D266917 | Power driven ski vehicle | Charles Stewart | 1982-11-16 |
| 4286682 | Motorized ski bob | Charles Stewart | 1981-09-01 |
| 4244436 | Vehicle with power driven ski | Charles Stewart | 1981-01-13 |
| 4234050 | Snow bob with detachable fuel tank | — | 1980-11-18 |