Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4730444 | Air seal for preventing seed loss in crop pickup mechanism | Leon E. Leffel | 1988-03-15 |
| 4691614 | Nonsymmetrical compensator for handgun | Leon E. Leffel | 1987-09-08 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4730444 | Air seal for preventing seed loss in crop pickup mechanism | Leon E. Leffel | 1988-03-15 |
| 4691614 | Nonsymmetrical compensator for handgun | Leon E. Leffel | 1987-09-08 |