Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6618899 | Door closer and method of producing a door closer | Lothar Ginzel, Günter Gollnick | 2003-09-16 |
| 5651216 | Door closer for a two-panel door with a closing sequence control mechanism | — | 1997-07-29 |
| 5461754 | Door closer with a detent for holding a door open and the detent therefor | Dietrich Jentsch, Thomas Hering, Thomas Warschewitz, Dieter Sichelschmidt, Bernd Winkler | 1995-10-31 |
| 5417013 | Overhead door closer with slide rail for concealed installation in door panels or door frames | — | 1995-05-23 |
| 5311642 | Door closer with a detent for holding a door open and the detent therefor | Dietrich Jentsch, Thomas Hering, Thomas Warschewitz, Dieter Sichelschmidt, Bernd Winkler | 1994-05-17 |
| 4785493 | Door check | Giselher Sieg | 1988-11-22 |
| 4658468 | Door check | Giselher Sieg | 1987-04-21 |
| 4483043 | Automatic door closer | — | 1984-11-20 |
| 4376323 | Automatic door closer | — | 1983-03-15 |
| 4349939 | Automatic door closer | — | 1982-09-21 |