Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7068421 | Raman amplifier and optical relay transmission system | Toshiyuki Tokura, Taichi Kogure, Satoshi Kajiya | 2006-06-27 |
| 7016614 | Optical wavelength division multiplexing transmission suppressing four-wave mixing and SPM-GVD effects | Satoshi Kajiya, Katsuhiro Shimizu, Yukio Kobayashi | 2006-03-21 |
| 6970650 | One-core two-way optical transmission system | Satoshi Kajiya, Kaoru Kinjo | 2005-11-29 |
| 6914718 | Optical repeating system and optical amplifying repeater control method | Yasunori Kasahara, Hideki Goto, Kenkichi Shimomura, Yukio Horiuchi, Masatoshi Suzuki +2 more | 2005-07-05 |
| 6826325 | Optical signal switching unit | Seiichiro Tabata | 2004-11-30 |
| 6804469 | Supervisory system of optical amplifier repeater system and supervisory method of optical amplifier repeater system | Yasunori Kasahara, Hideki Goto, Kenkichi Shimomura, Yukio Horiuchi, Masatoshi Suzuki +2 more | 2004-10-12 |
| 6801720 | Optical signal quality supervisory device | Yojiro Osaki, Aritomo Uemura, Hiroshi Ichibangase, Kiwami Matsushita, Tadayoshi Kitayama +4 more | 2004-10-05 |
| 6445478 | Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods | Katsuhiro Shimizu, Takeshi Komiya, Kiwami Matsushita, Tadayoshi Kitayama, Masatoshi Suzuki +4 more | 2002-09-03 |
| 6434288 | Optical switching system | Aritomo Uemura, Hiroshi Ichibangase, Tadayoshi Kitayama, Shu Yamamoto, Tetsuya Miyazaki +2 more | 2002-08-13 |
| 6292603 | Dispersion compensation device | Tadayoshi Kitayama, Hideaki Tanaka, Koji Goto | 2001-09-18 |
| 6236488 | Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods | Katsuhiro Shimizu, Takeshi Komiya, Kiwami Matsushita, Tadayoshi Kitayama, Masatoshi Suzuki +4 more | 2001-05-22 |
| 6028695 | Optical modulating apparatus | Aritomo Uemura, Katsuhiro Shimizu, Kiwami Matsushita, Tadayoshi Kitayama, Masatoshi Suzuki +2 more | 2000-02-22 |
| 5861967 | Wavelength multiplexed light transfer unit and wavelength multiplexed light transfer system | Tadayoshi Kitayama | 1999-01-19 |
| 5850301 | Wavelength multiplexed light transfer unit and wavelength multiplexed light transfer system | Tadayoshi Kitayama | 1998-12-15 |
| 5793908 | Wavelength multiplexed light transfer unit and wavelength multiplexed light transfer system | Tadayoshi Kitayama | 1998-08-11 |
| 5760949 | Light amplifier | Kuniaki Motoshima, Katsumi Takano, Tadayoshi Kitayama | 1998-06-02 |
| 5506724 | Gain controllable optical amplifier and applications thereof | Katsuhiro Shimizu, Kuniaki Motoshima, Tadayoshi Kitayama | 1996-04-09 |
| 5455704 | Optical-fiber light amplifier | Tadayoshi Kitayama, Katsuhiro Shimizu, Kiwami Matsushita, Nobuyuki Takemura, Eiichi Nakagawa | 1995-10-03 |
| 5400163 | Multiplex digital communication system for transmitting channel identification information | Susumu Sato, Hiroshi Ichibangase, Tadayoshi Kitayama | 1995-03-21 |
| 5367587 | Optical amplifier | Tadayoshi Kitayama, Katsuhiro Shimizu, Kiwami Matsushita, Nobuyuki Takemura, Eiichi Nakagawa | 1994-11-22 |
| 5268786 | Optical fiber amplifier and its amplification method | Kiwami Matsushita, Mayumi Miyazaki, Tadayoshi Kitayama | 1993-12-07 |