Issued Patents 2004
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6828913 | Scattered light smoke alarm | Ulrich Oppelt, Andreas Hensel, Bernd Siber | 2004-12-07 |
| 6803853 | Testing device for operation testing of a temperature sensor of an alarm or an alarm and a method of operation testing of an alarm | Joachim Schneider, Bernd Siber, Andreas Hensel, Ulrich Oppelt | 2004-10-12 |
| 6769285 | Device for and method of testing a fire alarm | Joachim Schneider, Bernd Siber, Andreas Hensel, Ulrich Oppelt | 2004-08-03 |
| 6704470 | Optoelectronic gas sensor based on optodes | Joachim Schneider, Andreas Hensel, Ulrich Oppelt | 2004-03-09 |
| 6696939 | Signaling fire detector | Joachim Schneider, Andreas Hensel, Ulrich Oppelt | 2004-02-24 |