Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665844 | Polymer films for detecting chemical substances | Thomas Stehlin, Yuan Liu, Shizuo Ogura, Tetsu Yamamoto, Akihiko Tokida +1 more | 1997-09-09 |
| 5658669 | Composite membranes and processes for their production | Olaf Althoff, Uwe Falk, Ude Scheunemann, Werner Hickel | 1997-08-19 |
| 5640234 | Optical sensor for detection of chemical species | Christoph Roth, Yuan Liu, Tetsu Yamamoto, Kenji Motosugi | 1997-06-17 |