Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4328760 | Skirt construction | G. Roger Pilkington, Frank G. Bercha | 1982-05-11 |
| 4323322 | Warm air canopy system for providing ice-free zone | G. Roger Pilkington, Frank G. Bercha | 1982-04-06 |