Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698267 | Method for fabricating high-activity electrodes for exhaust gas sensors | Karl-Hermann Friese, Hans-Martin Wiedenmann | 1997-12-16 |
| 5690800 | Electrochemical measuring element having a potential-free sensor element | Karl-Hermann Friese | 1997-11-25 |
| 5630920 | Electrochemical sensor for determining the oxygen concentration in gas mixtures | Karl-Hermann Friese, Hans-Martin Wiedenmann | 1997-05-20 |