Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621552 | Electrooptical liquid crystal system containing dual frequency liquid crystal mixture | David Coates | 1997-04-15 |
| 5604612 | Paper white PDLC system | David Coates, Ewald-Theodor Ginter | 1997-02-18 |