| 7008596 |
Device for preparing a plasma for the production of ozone and/or oxygen ions in the air |
Olaf Kiesewetter |
2006-03-07 |
| 6662382 |
Device for automatic release of a flushing process in urinals or similar sanitary appliances |
Rainer Kotte |
2003-12-16 |
| 6566894 |
Process and device for detecting oxidizable and/or reducible gases in air |
— |
2003-05-20 |
| 6375714 |
Device and process to produce active oxygen ions in the air for improved air quality |
Olaf Kiesewetter |
2002-04-23 |
| 6019130 |
Water run-out fitting |
— |
2000-02-01 |
| 6004201 |
Sensor assembly for controlling the ventilation of indoor spaces |
— |
1999-12-21 |
| 5793645 |
Method of operating a ventilation system especially of a motor vehicle |
Jorg Hiller, Norbert Pieper |
1998-08-11 |
| 5725425 |
Sensor system for controlling ventilation systems in vehicles |
Norbert Pieper, Jorg Hiller, Olaf Kiesewetter |
1998-03-10 |
| 5217692 |
Gas sensor arrangement |
Claus-Dieter Kohl |
1993-06-08 |
| 5066466 |
Apparatus for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space |
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert |
1991-11-19 |
| 4992965 |
Circuit arrangement for the evaluation of a signal produced by a semiconductor gas sensor |
Heinz Holter, Helmut Vietze |
1991-02-12 |
| 4930407 |
Sensing system for controlling air circulation valves in motor vehicles |
Heinz Holter |
1990-06-05 |
| 4882287 |
Process for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space |
Heinz Holter, Heinrich Igelbuscher, Heinrich Gresch, Heribert Dewert |
1989-11-21 |