Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5031858 | Apparatus and method for folding and locking rotor blades | Ernst C. Schellhase, Dan Anastas, deceased, Paul E. Keefer, Cecil E. Covington, Joseph John Zierer +1 more | 1991-07-16 |