Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878742 | Liquid crystal optical modulator | Yukitoshi Ohkubo, Yasuyuki Watanabe, Takayuki Ishii, Masato Yamanobe, Kazuya Ishiwata | 1989-11-07 |
| 4850681 | Optical modulation device | Masao Yamanobe, Yasuyuki Watanabe, Hajime Sakata, Yukitoshi Ohkubo, Tomoyuki Umezawa +5 more | 1989-07-25 |