Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5913661 | Striated hybrid blade | Joseph T. Stevenson | 1999-06-22 |
| 5226784 | Blade damper | Peter W. Mueller, Joseph T. Stevenson, Christopher Charles Glynn, Sang Yeng Park, Daniel Edward Wines | 1993-07-13 |