Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4545337 | Rotary valve engine | David R. Kosa | 1985-10-08 |
| 4473041 | Rotary valve engine | David R. Kosa | 1984-09-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4545337 | Rotary valve engine | David R. Kosa | 1985-10-08 |
| 4473041 | Rotary valve engine | David R. Kosa | 1984-09-25 |