Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11180426 | Dipeptide-containing granular material | Martin Koerfer, Hans Joachim Hasselbach, Gerit Niggemann, Antje HANSMEIER, Hans Christian Alt +1 more | 2021-11-23 |
| 8863815 | Track and guide system for a door | Tom Jansen, Carl David Hardison, III, Jason Dondlinger | 2014-10-21 |
| 8857498 | Track and guide system for a door | Jason Dondlinger, Carl David Hardison, III, Tom Jansen | 2014-10-14 |
| 8113265 | Washdown door | Carl David Hardison, III, James C. Boerger, Thomas Jansen | 2012-02-14 |
| 8037921 | Track and guide system for a door | Jason Dondlinger, Carl David Hardison, III, Tom Jansen | 2011-10-18 |
| 7757437 | Resilient retention system for a door panel | Perry W. Knutson, Rodney Kern, Bill Hoerner, Allan H. Hochstein | 2010-07-20 |
| 7748431 | Track and guide system for a door | Tom Jansen, Jason Dondlinger, Carl David Hardison, III | 2010-07-06 |
| 6964289 | Industrial door system responsive to an impact | — | 2005-11-15 |
| 6926061 | Cable tensioner and shock absorber for a door | — | 2005-08-09 |
| 6615898 | Release mechanism for a sectional door | — | 2003-09-09 |
| 6612357 | Impact detection system for industrial doors | Mark D. Beringer, David LEPPERT | 2003-09-02 |
| 6598648 | Industrial door system responsive to an impact | — | 2003-07-29 |
| 6560927 | Counteraction system for a sectional door | — | 2003-05-13 |
| 6360487 | Resilient door panel | Rodney Kern, Joe Korman, Dave Leppert, James Schwingle, Dean Shanahan | 2002-03-26 |
| 6330763 | Translating door with disengageable seals | Rodney Kern, Dave Leppert, James Schwingle, Dean Shanahan | 2001-12-18 |
| 6089305 | Curtain guiding assembly for a soft edge door with a selectively tensioned leading edge | Wayne E. Gruben, James Schwingle | 2000-07-18 |
| 5957187 | Releaseable assembly for a door | Wayne E. Gruben, James Schwingle | 1999-09-28 |
| 5944086 | Curtain bottom tensioning assembly | Wayne E. Gruben, James Schwingle | 1999-08-31 |
| 5915448 | Curtain bottom tensioning assembly | — | 1999-06-29 |
| 5743317 | Impact detection system for industrial doors | Mark D. Beringer, David LEPPERT | 1998-04-28 |
| 5638883 | Breakaway guide assembly for a roller door | — | 1997-06-17 |
| 5353859 | Roller door apparatus | John Oltahfer, Glenn A. Nicol, David Noon, David LEPPERT, Mark Ungs +1 more | 1994-10-11 |