Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833405 | Shaft failure monitoring system using angled rotating teeth and phase detection | Paul N. Richards, Michael C. Douglas, David C. Snowden, Kenneth W. Proctor | 1989-05-23 |
| 4807129 | Helicopter rotor and engine control | — | 1989-02-21 |