Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850681 | Optical modulation device | Masao Yamanobe, Yasuyuki Watanabe, Hajime Sakata, Yukitoshi Ohkubo, Tomoyuki Umezawa +5 more | 1989-07-25 |
AN
Akihiko Nagano
Overall (1989): #134,562 of 140,708Top 100%
1
Patents 1989