Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826620 | Chiral phenolic esters of mesogenic carboxylic acids and their use as admixture in liquid crystal phases | Gerd Heppke, Detlef Lotzsch, Gunter Scherowsky | 1989-05-02 |
| 4818076 | Color-selective circular polarizer and its use | Gerd Heppke | 1989-04-04 |