Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |
| 5181007 | PTC temperature sensor for use in an exhaust gas system | Karl-Hermann Friese | 1993-01-19 |
| 5172466 | Process for producing PTC temperature sensor elements for PTC temperature sensor | Karl-Hermann Friese, Gunther Stecher | 1992-12-22 |
| 5169512 | Planar polarographic probe for determining the .lambda. value of gas mixtures | Gerhard Schneider, Kurt Bayha | 1992-12-08 |
| 5142266 | NTC temperature sensor and process for producing NTC temperature sensing elements | Karl-Hermann Friese, Gunther Stecher | 1992-08-25 |
| 4756885 | Measuring sensor for determining the oxygen content in gases | Lothar Raff, Helmut Weyl | 1988-07-12 |
| 4594984 | Regulation device for the mixture composition of an internal combustion engine | Lothar Raff | 1986-06-17 |
| 4463594 | Wide-range temperature operating system for combustion gas oxygen sensor, and method | Lothar Raff | 1984-08-07 |
| 4419190 | Method and apparatus to measure the operating temperature of solid electrolyte-type gas sensors | Hermann Dietz, Ferdinand Grob, Klaus Muller, Lothar Raff, Franz Rieger | 1983-12-06 |
| 4400260 | Shielded, heated electrochemical gas sensor | Roland Stahl | 1983-08-23 |
| 4392523 | Process and apparatus for controlling the level of a molten metal surface in continuous casting moulds | Manfred Beller | 1983-07-12 |
| 4320080 | Method to manufacture soft magnetic pressed bodies | Friedrich Esper | 1982-03-16 |
| 4268468 | Method of making a medical prosthesis | Friedrich Esper | 1981-05-19 |