Ferris; Donald Leroy
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ferris; Donald Leroy.The latest application filed is for "cross beam rotor".
- Ferris; Donald Leroy - Newtown CT
| Patent | Date |
|---|---|
| Cross beam rotor Grant 4,087,203 - Ferris May 2, 1 | 1978-05-02 |
| Torque reacting means for the hubs of cross beam rotors Grant 4,047,839 - Ferris , et al. September 13, 1 | 1977-09-13 |
| Two-position helicopter main rotor Grant 3,972,491 - Ferris , et al. August 3, 1 | 1976-08-03 |
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