Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8280662 | Optical system, optical module and threshold setting method | — | 2012-10-02 |
| 7970291 | Optical-receiving apparatus and bias-voltage-control method used for the optical-receiving apparatus | — | 2011-06-28 |
| 7648289 | Module having a handle to be operated to attach the module to a cage | Makoto Miyoshi, Kazuya Sasaki, Akihiko Hayashi, Shinichi Aoki | 2010-01-19 |
| 7257332 | Optical transmitter and its control method | Keisuke Imai, Kakuji Inoue, Setsuo Misaizu, Toru Yamazaki | 2007-08-14 |
| 7031621 | Optical receiving device | Tetsuya Kiyonaga | 2006-04-18 |
| 6229833 | Laser diode protecting circuit and laser driving current control circuit | Mitsuharu Noda, Motoyoshi Sekiya, Setsuo Misaizu, Tetsuya Kiyonaga, Nobuaki Sato | 2001-05-08 |
| 6040931 | Optical transmitter, terminal-station apparatus having the optical transmitter, and optical communication system | Akimitsu Miyazaki, Sadao Ibukuro | 2000-03-21 |
| 5973812 | Optical transmitter and optical communication system | Keisuke Imai | 1999-10-26 |
| 5966938 | Peltier control circuit and a peltier device structure | Takashi Tsuda, Tetsuo Ishizaka, Shunichi Sato, Saeko Yokoi, Manabu Komiyama +2 more | 1999-10-19 |
| 5900621 | Light transmitter having an automatic bias control circuit | Sadao Ibukuro, Akihiko Hayashi, Takashi Tsuda | 1999-05-04 |
| 5900959 | Optical transmitter, optical communication system and optical communication method | Mitsuharu Noda, Setsuo Misaizu, Motoyoshi Sekiya | 1999-05-04 |
| 5736875 | Discrimination circuit capable of automatically optimizing discrimination level and discrimination phase | Hisaya Sakamoto, Takashi Tsuda | 1998-04-07 |
| 5680246 | Optical amplifier and optical transmission apparatus | Tsukasa Takahashi, Hiroyuki Itou, Yuji Tamura, Michikazu Shima, Kazuo Yamane +6 more | 1997-10-21 |
| 5548435 | Optical Transmitter | Yoko Tahara | 1996-08-20 |
| 5515682 | Peltier control circuit and a peltier device structure | Takashi Tsuda, Tetsuo Ishizaka, Shunichi Sato, Saeko Yokoi, Manabu Komiyama +2 more | 1996-05-14 |