Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11821757 | Explosion-protected housing for means for transmitting and receiving electromagnetic radiation | Bernd Ziems, Hauke Dittmer, Dirk Siemer, Axel Grothoff, Peter ZÜLZER +2 more | 2023-11-21 |
| 10825312 | Modular multi-sensor fire- and/or spark detector | Bernd Ziems, Hauke Dittmer, Dirk Siemer, Axel Grothoff, Peter Zuelzer +2 more | 2020-11-03 |
| 10761013 | Method and device for cleaning an optical entrance window of a fire alarm | — | 2020-09-01 |
| 10726707 | Hazard detector and method for transmitting a hazard signal and system comprising the hazard detector | Bernd Ziems, Hauke Dittmer, Dirk Siemer, Axel Grothoff, Peter Zuelzer +2 more | 2020-07-28 |
| 10089859 | Method and device for measuring a line resistance of control lines in hazard warning and control systems | — | 2018-10-02 |
| 8400314 | Fire alarm | Hauke Dittmer, Dirk Siemer, Peter Zuelzer, Bernd Ziems, Axel Grothoff +1 more | 2013-03-19 |