Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7382987 | Identification level control method and optical receiver | Yuko Yoshida, Tetsuji Sato | 2008-06-03 |
| 7257332 | Optical transmitter and its control method | Keisuke Imai, Kakuji Inoue, Yasunori Nagakubo, Toru Yamazaki | 2007-08-14 |
| 6807245 | PLO device | Sadao Ibukuro, Isao Nakajima | 2004-10-19 |
| 6707024 | Bias circuit for a photodetector, and an optical receiver | Yoshinobu Miyamoto, Nobuaki Sato, Hisaya Sakamoto, Akimitsu Miyazaki | 2004-03-16 |
| 6501774 | Optical transmission apparatus for multiple wavelengths and optical transmission wavelength control method | Hiroshi Kuwahara, Norio Nagase, Tetsuya Kiyonaga, Tomoyuki Otsuka, Motoyoshi Sekiya | 2002-12-31 |
| 6229833 | Laser diode protecting circuit and laser driving current control circuit | Mitsuharu Noda, Motoyoshi Sekiya, Tetsuya Kiyonaga, Nobuaki Sato, Yasunori Nagakubo | 2001-05-08 |
| 6097746 | Laser diode protecting circuit | Mitsuharu Noda, Motoyoshi Sekiya, Tetsuya Kiyonaga | 2000-08-01 |
| 5900959 | Optical transmitter, optical communication system and optical communication method | Mitsuharu Noda, Motoyoshi Sekiya, Yasunori Nagakubo | 1999-05-04 |
| 5706117 | Drive circuit for electro-absorption optical modulator and optical transmitter including the optical modulator | Keisuke Imai, Mitsuharu Noda, Hiroshi Yamada | 1998-01-06 |
| 5646763 | Optical transmitter and laser diode module for use in the optical transmitter | Sunao Itou, Takashi Tsuda | 1997-07-08 |
| 5636048 | Equalizing amplifier, receiver using the same and preamplifier | Kazuhisa Kogure, Hirokazu Osada, Yasuhiro Tanaka, Hiroo Kitasagami, Makoto Miyoshi +6 more | 1997-06-03 |
| 5625181 | Light-receipt system with current bias circuit and pre-amplifier for use in optical digital communication | Akihiko Yasuda, Hisaya Sakamoto, Yuji Miyaki, Norio Nagase, Hiroshi Kuzukami | 1997-04-29 |
| 5557445 | Optical signal transmitter having an apc circuit with automatic bias current control | — | 1996-09-17 |
| 5499258 | Automatic temperature control circuit of laser diode and electric/optical signal converting unit using the same | Michinao Kawano, Tomoko Anzai, Takashi Tsuda | 1996-03-12 |