Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6030177 | Drive system for a variable diameter tilt rotor | — | 2000-02-29 |
| 6019578 | Variable diameter rotor blade actuation system | Paul FITZGERALD | 2000-02-01 |
| 5149013 | Retractable helicopter rotor | Ralph D. Costanzo, Robert J. Durwin, William L. Noehren | 1992-09-22 |