Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5331446 | Liquid crystal optical element and a laser projection apparatus using polymer dispersed liquid crystal | Yoshinori Hirai, Hiroshi Kumai, Takehiko Nishiyama, Satoshi Niiyama | 1994-07-19 |
| 5314731 | Surface-treated substrate | Takashige Yoneda, Yukiko Takano | 1994-05-24 |
| 5283675 | Liquid crystal display element with electrode having concave-convex surface at liquid crystal side | Yoshiharu Ooi, Yoshinori Hirai, Satoshi Niiyama | 1994-02-01 |