Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7757437 | Resilient retention system for a door panel | Peter S. Schulte, Perry W. Knutson, Rodney Kern, Allan H. Hochstein | 2010-07-20 |
| 7699089 | Power-operated folding door | Perry W. Knutson, Mike Lamey, Mark Ungs, Rodney Kern | 2010-04-20 |
| 6942000 | Coupling mechanism and panel for sectional door | Tom Jansen, Perry W. Knutson | 2005-09-13 |
| 6698490 | Release mechanism for industrial doors | Tom Jansen, Perry W. Knutson, Steve Lester, Ronald P. Snyder, Donald P. Grant | 2004-03-02 |