Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680246 | Optical amplifier and optical transmission apparatus | Tsukasa Takahashi, Hiroyuki Itou, Yuji Tamura, Michikazu Shima, Kazuo Yamane +6 more | 1997-10-21 |
| 5625481 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Michikazu Shima, Kazuo Yamane | 1997-04-29 |