Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12359959 | Sensor apparatus for capturing a filling level and/or a quality of a fluid, and method for producing said apparatus | Karl-Friedrich Pfeiffer, Henning Grotevent | 2025-07-15 |
| 10928241 | Ultrasound sensor | Karl-Friedrich Pfeiffer, Peter Konopka, Frantisek Mezulian, Pavel Sofer | 2021-02-23 |
| 9829369 | Ultrasound level transmitter | Frank Kuehnel, Karl-Friedrich Pfeiffer | 2017-11-28 |
| 9121745 | Multichamber ultrasonic sensor for determining a liquid level | Oliver Beyer, Henning Grotevent, Bernd Harigel, Gerd Unverzagt, Andreas Weibert | 2015-09-01 |
| 8947981 | Attenuating mass for an ultrasonic sensor, use of epoxy resin | Walter Fischer, Volker Muhrer, Karl-Friedrich Pfeiffer | 2015-02-03 |
| 8096293 | Water-heating system | Wolfgang Hoellenriegel | 2012-01-17 |
| 7881465 | Circuit and method for calculating a logic combination of two encrypted input operands | Antoine Degrendel, Winfried Kamp | 2011-02-01 |
| 7876893 | Logic circuit and method for calculating an encrypted result operand | Antoine Degrendel, Winfried Kamp, Thomas Kodytek | 2011-01-25 |
| 7714447 | Semiconductor chip arrangement | Markus Eigner, Wolfgang Gruber, Stefan Ruping | 2010-05-11 |
| 7637386 | Plastic underground tank | — | 2009-12-29 |
| 6206228 | Double-walled tank for storing fluids such as heating-oil, and the like | — | 2001-03-27 |
| 6066695 | Method of producing thermoplastic synthetic resin compositions with reduced diffusion coefficients | Jurgen Dreier | 2000-05-23 |
| 5877260 | Method of producing thermoplastic synthetic resin compositions with reduced diffusion cofficients | Jurgen Dreier | 1999-03-02 |
| 5026966 | Method and a device for cutting a tub | — | 1991-06-25 |
| 4381908 | Mold apparatus for forming profile employing reinforcing preform | — | 1983-05-03 |
| 4213449 | Solar collector | Juergen Dreier | 1980-07-22 |