Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5784515 | Optical fiber cross connection apparatus and method | Naoyuki Tamaru, Yasuhide Nishida, Kazumasa Kaneko, Joji Yamaguchi, Tetsufumi Shoji | 1998-07-21 |
| 5204921 | Automated optical main distributing frame system | Shigefumi Hosokawa, Kunihiko Sasakura, Syuichirou Inagaki, Shigeru Umemura, Hirobumi Kimura +3 more | 1993-04-20 |
| 5017145 | Matrix switching device and method of manufacturing the same | Shigefumi Hosokawa, Yasuo Kumakura, Shigeru Umemura, Shuichiro Inagaki | 1991-05-21 |