Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702638 | Phenanthridine derivatives, and their use in liquid-crystalline mixtures | Rainer Wingen | 1997-12-30 |
| 5648021 | Phenanthrene derivatives and their use in liquid-crystalline mixtures | Rainer Wingen | 1997-07-15 |