Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5297759 | Rotary aircraft passively stable in hover | Neil Tilbor, Herman M. Drees, Charles Sink, Jeffrey James Corsiglia, Warren E. Bosch | 1994-03-29 |
| 5173882 | Sonar system for and method of arctic seafloor reconnaissance | — | 1992-12-22 |
| 5082079 | Passively stable hovering system | Peter B. S. Lissaman, Herman M. Drees, Charles Sink | 1992-01-21 |
| 5070955 | Passively stable hovering system | Peter B. S. Lissaman, Herman M. Drees, Charles Sink | 1991-12-10 |
| 5035382 | Rapid assembly aircraft for ground surveillance | Peter B. S. Lissaman, W. Ray Morgan, Martyn Cowley, Charles Sink | 1991-07-30 |