Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680246 | Optical amplifier and optical transmission apparatus | Tsukasa Takahashi, Hiroyuki Itou, Yuji Tamura, Kazuo Yamane, Yumiko Kawasaki +6 more | 1997-10-21 |
| 5625481 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Yumiko Kawasaki, Kazuo Yamane | 1997-04-29 |
| 5604759 | Drive circuit for electronic device | Yuji Miyaki | 1997-02-18 |