Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9356689 | Optical transmitter and optical signal transmission method | Takahito Tanimura, Takeshi Hoshida | 2016-05-31 |
| 9184867 | Transmission control device, transmission system, and transmission method | Tomoo Takahara, Toshiki Tanaka | 2015-11-10 |
| 9118436 | PON system and subcarrier assigning method | Tomoo Takahara, Toshiki Tanaka | 2015-08-25 |
| 9088383 | Transmitting apparatus, receiving apparatus, optical frequency division multiplex transmission system, and optical signal communication method | Toshiki Tanaka, Tomoo Takahara, Tomoyuki Kato, Yutaka Kai, Shigeki Watanabe | 2015-07-21 |
| 8855498 | Skew suppression method and optical transmission system | Toshiki Tanaka | 2014-10-07 |
| 8773755 | Optical amplifier and multicore fiber | Takeshi Hoshida | 2014-07-08 |
| 8693891 | Optical modulation apparatus and optical modulation method | Tomoo Takahara, Takeshi Hoshida | 2014-04-08 |
| 8666252 | Optical network system | Tomoo Takahara, Toshiki Tanaka | 2014-03-04 |
| 8611760 | Optical modulation device and optical modulation method | Tomoo Takahara | 2013-12-17 |
| 8582980 | Optical device and optical modulation method | Tomoo Takahara, Yuichi Akiyama, Masahiro Yuki | 2013-11-12 |
| 8582981 | Optical transmitter and control method therefor | Yuichi Akiyama, Hideyuki Miyata, Toshiki Tanaka | 2013-11-12 |
| 8565617 | Optical device, optical modulation method, and optical transmitter | Tomoo Takahara, Toshiki Tanaka | 2013-10-22 |
| 8565616 | Polarized-wave-multiplexing optical transmitter and control method of polarized-wave-multiplexed optical signal | Toshiki Tanaka, Yuichi Akiyama | 2013-10-22 |
| 8565615 | Optical modulation apparatus and optical modulation method | Tomoo Takahara, Takeshi Hoshida | 2013-10-22 |
| 8301039 | Delay processing apparatus, signal amplification apparatus, opto-electric conversion apparatus, analog-digital conversion apparatus, receiving apparatus, and receiving method | Tomoo Takahara, Hisao Nakashima | 2012-10-30 |
| 8064130 | Optical amplifier | Yasushi Sugaya, Etsuko Hayashi | 2011-11-22 |
| 8054455 | Optical amplifier provided with control function of pumping light, and optical transmission system using the same | Yasushi Sugaya, Etsuko Hayashi | 2011-11-08 |
| 7853152 | Signal regeneration device, optical receiver, and signal processing method | Tomoo Takahara, George Ishikawa | 2010-12-14 |
| 7778553 | Optical transmitter | Masahiro Yuki, Kentaro Nakamura, Hiroki Ooi | 2010-08-17 |
| 7729588 | Optical fiber, manufacturing method of the same, and optical amplifier | Etsuko Hayashi, Shinya Inagaki | 2010-06-01 |
| 7715093 | Individual band gain equalizer for optical amplifiers | Miki Onaka, Etsuko Hayashi | 2010-05-11 |
| 7551347 | Optical amplification characteristics simulation apparatus and optical amplification characteristics simulation method | Etsuko Hayashi, Shunsuke Ono, Setsuhisa Tanabe, Shinichirou Muro | 2009-06-23 |
| 7505197 | Optical amplifier provided with control function of pumping light, and optical transmission system using the same | Yasushi Sugaya, Etsuko Hayashi, Shinichirou Muro | 2009-03-17 |
| 7359112 | Individual band gain equalizer for optical amplifiers | Miki Onaka, Etsuko Hayashi, Shinichirou Muro | 2008-04-15 |
| 7285348 | Fuel cell | Shoji Yamashita, Takashi Ono, Shoji Kohsaka, Kazuto Matsukami | 2007-10-23 |