Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306837 | Bearingless tail rotor for helicopters | Cecil E. Covington, Richard E. Wheelis | 1981-12-22 |
| 4293276 | Laminated composite rotor yoke | David L. Williams | 1981-10-06 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4306837 | Bearingless tail rotor for helicopters | Cecil E. Covington, Richard E. Wheelis | 1981-12-22 |
| 4293276 | Laminated composite rotor yoke | David L. Williams | 1981-10-06 |