Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5955852 | Door having a door maneuvering mechanism having a slide rail with a sensor in the slide rail | — | 1999-09-21 |
| 5901412 | Top-mounted door closer | — | 1999-05-11 |
| 5461754 | Door closer with a detent for holding a door open and the detent therefor | Horst Tillmann, Thomas Hering, Thomas Warschewitz, Dieter Sichelschmidt, Bernd Winkler | 1995-10-31 |
| 5311642 | Door closer with a detent for holding a door open and the detent therefor | Horst Tillmann, Thomas Hering, Thomas Warschewitz, Dieter Sichelschmidt, Bernd Winkler | 1994-05-17 |
| 4999872 | Door closer | — | 1991-03-19 |
| 4937913 | Door closer | — | 1990-07-03 |
| 4263694 | Door closer | — | 1981-04-28 |
| 4234996 | Automatic door closer constructed for releasably holding a door in a predetermined partly open position | — | 1980-11-25 |