Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644591 | Aerodynamic supplementary device for float aircraft | Frederick E. To | 2003-11-11 |
| 6499420 | Pneumatic float for light and ultralight aircraft | Frederick E. To | 2002-12-31 |
| 6347769 | Adaptive pneumatic wings for flying devices with fixed wings | Frederick E. To | 2002-02-19 |
| 6199796 | Adaptive pneumatic wing for fixed wing aircraft | Andreas Reinhard, Frederick E. To, Otto Ramseier | 2001-03-13 |