Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5368713 | Laminated system for gas sensors and process for producing it | Karl-Hermann Friese, Eberhard Goehring | 1994-11-29 |
| 5334350 | Resistance probe for determining gas compositions and method of producing it | Karl-Hermann Friese, Werner Gruenwald, Gerhard Hoetzel | 1994-08-02 |
| 5314604 | Sensor element for limit current sensors to determine the .lambda.-value of gas mixtures | Karl-Hermann Friese, Werner Gruenwald | 1994-05-24 |
| 5310575 | Method of making a porous ceramic protective layer on an electrode of an electrochemical sensor for exposure to hot gas | Karl-Hermann Friese, Eva Soll | 1994-05-10 |