Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4216925 | Helicopter of the type having two coaxial counterrotating rotors with a drive mechanism interposed between the power plant and the rotors | — | 1980-08-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4216925 | Helicopter of the type having two coaxial counterrotating rotors with a drive mechanism interposed between the power plant and the rotors | — | 1980-08-12 |