Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836657 | Optical change-over switch utilizing ferroelectric liquid crystal material | Yasuhiro Gunji, Sadayuki Okada, Masato Isogai, Katsumi Kondo, Masahiko Ibamoto +1 more | 1989-06-06 |