Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741501 | Preventing augmenting vertical load induced oscillations in a helicopter | Douglas H. Clelford, Richard D. Murphy | 1988-05-03 |
| 4213584 | Helicopter hover stability and cruise gust effect alleviation | Ricardo L. Perez, Ronald E. Barnum | 1980-07-22 |
| 4206891 | Helicopter pedal feel force proportional to side slip | Ricardo L. Perez, Ronald E. Barnum | 1980-06-10 |