Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4354854 | Apparatus for colorimetrically measuring traces of gas | Ulrich Fritze, Gerd Janser, Dieter Kitzelmann | 1982-10-19 |
| 4219398 | Apparatus for continuous measurement of gas traces with ion-sensitive electrodes | Ulrich Fritze | 1980-08-26 |