Issued Patents All Time
Showing 51–61 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6919535 | Electric heating for motor vehicles | Gunter Uhl, Michael Niederer, Marc Bernhardt | 2005-07-19 |
| 6897416 | Air current interruption detection responsive to consumed PTC heater power | Michael Zeyen | 2005-05-24 |
| 6720536 | Electric heating device | — | 2004-04-13 |
| 6472645 | Air heating device | — | 2002-10-29 |
| 6402943 | Diesel filter system | — | 2002-06-11 |
| 6392207 | Electric heating device, especially for use in motor vehicles | Klaus Beetz | 2002-05-21 |
| 6093909 | Flow heater | Klaus Beetz | 2000-07-25 |
| 5990459 | System for controlling a plurality of resistive heating elements | Hans-Peter Feustel, Klaus Beetz | 1999-11-23 |
| 5562844 | Ptc heater radiator with frame members applying pressure to heaters | Josef David | 1996-10-08 |
| 5057672 | Radiator having PTC electric resistance heating elements and spring-biased fin arrangement | Josef David | 1991-10-15 |
| 4814584 | Profiled PCT heater for heating a tubular member | Norbert Buchlaub | 1989-03-21 |