Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665844 | Polymer films for detecting chemical substances | Werner Prass, Thomas Stehlin, Yuan Liu, Shizuo Ogura, Tetsu Yamamoto +1 more | 1997-09-09 |
| 5644069 | Sensor for distinguishing fuel vapors | Yuan Liu, Christoph Roth, Tetsu Yamamoto, Masayuki Arai | 1997-07-01 |
| 5640234 | Optical sensor for detection of chemical species | Christoph Roth, Yuan Liu, Werner Prass, Tetsu Yamamoto | 1997-06-17 |