Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6282214 | Wavelength multiplexing light source | Ryosuke Goto, Toshio Goto, Masakazu Mori | 2001-08-28 |
| 6061173 | Wavelength-division-multiplexing optical amplifier | Michikazu Shima, Yumiko Kawasaki, Kenji Tagawa, Shinya Inagaki, Norifumi Shukunami | 2000-05-09 |
| 6038063 | Optical amplifier and optical transmission system including the optical amplifier | Takashi Tsuda, Hiroshi Nishimoto, Yumiko Kawasaki, Satoru Okano | 2000-03-14 |
| 5977020 | Thermosensitive reversible recording material | Makoto Nishioka | 1999-11-02 |
| 5928988 | Thermosensitive reversible recording material | Makoto Nishioka | 1999-07-27 |
| 5877881 | Optical transmission system | Akira Miyauchi, Yumiko Kawasaki, Satoru Okano | 1999-03-02 |
| 5870217 | Multi-wavelength optical batch amplification apparatus | Hiroyuki Itou, Michikazu Shima | 1999-02-09 |
| 5841558 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Michikazu Shima, Yumiko Kawasaki | 1998-11-24 |
| 5798857 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Michikazu Shima, Yumiko Kawasaki | 1998-08-25 |
| 5764404 | Wavelength-division-multiplexing optical amplifier | Michikazu Shima, Yumiko Kawasaki, Kenji Tagawa, Shinya Inagaki, Norifumi Shukunami | 1998-06-09 |
| 5702850 | Thermosensitive reversible color-developing and disappearing agent | Makoto Nishioka, Masaki Nishimura, Yoshiyuki Takahashi | 1997-12-30 |
| 5680246 | Optical amplifier and optical transmission apparatus | Tsukasa Takahashi, Hiroyuki Itou, Yuji Tamura, Michikazu Shima, Yumiko Kawasaki +6 more | 1997-10-21 |
| 5625481 | Auxiliary-signal transmission system | Yuji Tamura, Hiroyuki Itou, Tsukasa Takahashi, Michikazu Shima, Yumiko Kawasaki | 1997-04-29 |
| 5434691 | Communications system having optical transmission line switching system | — | 1995-07-18 |
| 5327275 | Switching system of optical transmission lines for protecting from trouble | Naonobu Fujimoto, Takashi Kihara, Takeo Fukushima, Koichi Nishimura, Hatsumi Iino | 1994-07-05 |
| 4965797 | Parallel-to-serial converter | Masanori Shimasue | 1990-10-23 |
| 4816699 | Slice amplifier using FET's | Masakazu Mori, Tetsuo Wada, Yuji Miyaki, Kazuhiro Suzuki, Yoshinori Ohkuma | 1989-03-28 |
| 4813048 | Semiconductor laser driving device | Masakazu Mori, Takashi Tsuda, Yoshinori Ohkuma, Kazuhiro Suzuki | 1989-03-14 |
| 4803384 | Pulse amplifier suitable for use in the semiconductor laser driving device | Masakazu Mori, Takashi Tsuda, Yoshinori Ohkuma, Kazuhiro Suzuki | 1989-02-07 |
| 4765735 | Method of measuring a mode partition characteristics of a laser diode and an apparatus of the same | Masakazu Mori, Takashi Tsuda | 1988-08-23 |