Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6061173 | Wavelength-division-multiplexing optical amplifier | Kazuo Yamane, Yumiko Kawasaki, Kenji Tagawa, Shinya Inagaki, Norifumi Shukunami | 2000-05-09 |
| 6055094 | Optical amplifying apparatus | Hiroshi Nishimoto | 2000-04-25 |
| 5870217 | Multi-wavelength optical batch amplification apparatus | Hiroyuki Itou, Kazuo Yamane | 1999-02-09 |
| 5841558 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Yumiko Kawasaki, Kazuo Yamane | 1998-11-24 |
| 5822112 | Control apparatus for optical amplifier | Hiroyuki Itou, Yoshihito Onoda, Yuji Tamura | 1998-10-13 |
| 5798857 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Yumiko Kawasaki, Kazuo Yamane | 1998-08-25 |
| 5764404 | Wavelength-division-multiplexing optical amplifier | Kazuo Yamane, Yumiko Kawasaki, Kenji Tagawa, Shinya Inagaki, Norifumi Shukunami | 1998-06-09 |
| 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 |