Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5277380 | Toroidal fuselage structure for unmanned aerial vehicles having ducted, coaxial, counter-rotating rotors | James P. Cycon, Fred W. Kohlhepp, Marvin D. Farrell, David F. Sandy | 1994-01-11 |