Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5061153 | Aircraft propeller assembly with blade pitch reset for ground idle | Donald C. Stackhouse, Earl W. Jones, Dennis S. Zimpfer | 1991-10-29 |
| 4904157 | Aircraft propeller assembly with blade pitch reset for ground idle | Donald C. Stackhouse, Earl W. Jones, Dennis S. Zimpfer | 1990-02-27 |
| 4419674 | Wire wound flat-faced charge plate | Surinder K. Bahl, Margene C. Howell | 1983-12-06 |