Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6612357 | Impact detection system for industrial doors | David LEPPERT, Peter S. Schulte | 2003-09-02 |
| 5794678 | Sealing system for a roller door | David LEPPERT | 1998-08-18 |
| 5743317 | Impact detection system for industrial doors | David LEPPERT, Peter S. Schulte | 1998-04-28 |