Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7225783 | Engine motion active control | Frederick P. Hohnstadt, Steven A. Tervo, Brian E. Ferrari, Donald R. Elzinga, Jr., Eric J. Defenderfer +3 more | 2007-06-05 |
| 6374939 | Engine mount assembly | Frederick P. Hohnstadt, Blaine A. Heavener, John Roby | 2002-04-23 |