Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6801720 | Optical signal quality supervisory device | Takashi Mizuochi, Yojiro Osaki, Aritomo Uemura, Hiroshi Ichibangase, Kiwami Matsushita +4 more | 2004-10-05 |
| 6434288 | Optical switching system | Aritomo Uemura, Hiroshi Ichibangase, Takashi Mizuochi, Tadayoshi Kitayama, Shu Yamamoto +2 more | 2002-08-13 |