Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868962 | Method of fabricating a helicopter rotor system | Francis H. McArdle | 1989-09-26 |
| 4795310 | Helicopter rotor system and method | Francis H. McArdle, Richard T. DeRosa | 1989-01-03 |
| 4542567 | Method of fabricating a helicopter rotor hub | Francis H. McArdle | 1985-09-24 |
| 4543040 | Helicopter rotor system | Francis H. McArdle | 1985-09-24 |
| 4499626 | Broom handle holding attachment for an industrial broom | — | 1985-02-19 |