Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4699568 | Aircraft propeller with improved spinner assembly | Donald C. Stackhouse | 1987-10-13 |
| 4524499 | Method of fabricating an aircraft propeller assembly with composite blades | Richard V. Grimes, David F. Thompson | 1985-06-25 |
| 4407635 | Aircraft propeller assembly with composite blades | Richard V. Grimes, David F. Thompson | 1983-10-04 |
| 4302155 | Air craft propeller assembly with composite blades | Richard V. Grimes, David F. Thompson | 1981-11-24 |