Issued Patents 2016
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9481455 | Dual series damper system | David A. Popelka, Frank B. Stamps, Mark Adam Wiinikka | 2016-11-01 |
| 9260185 | System and method of harvesting power with a rotor hub damper | Charles Eric Covington, David A. Popelka, Frank B. Stamps | 2016-02-16 |