Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7538506 | Power lift gate for automotive vehicle | Gregory B. Zinn, Barton Heldke | 2009-05-26 |
| 7320497 | Power lift gate for automotive vehicle | Gregory B. Zinn, Barton Heldke | 2008-01-22 |
| 7219945 | Power lift gate for automotive vehicle | Gregory B. Zinn, Barton Heldke | 2007-05-22 |