Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4306837 | Bearingless tail rotor for helicopters | Vas H. Brogdon, Cecil E. Covington | 1981-12-22 | $5,516,000 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4306837 | Bearingless tail rotor for helicopters | Vas H. Brogdon, Cecil E. Covington | 1981-12-22 | $5,516,000 |