Issued Patents All Time
Showing 1–25 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12214542 | Link device and stretching machine | Naoaki YOSHIMATSU | 2025-02-04 |
| 12090688 | Stretching apparatus and parts replacement method of stretching apparatus | Naoaki YOSHIMATSU | 2024-09-17 |
| 10782589 | Wavelength conversion apparatus, optical parametric amplifier, transmission apparatus, and optical transmission system | Tomoaki Takeyama, Yoshitaka Yamanaka | 2020-09-22 |
| 9825731 | Optical transmission system, optical transmission apparatus, and optical transmission method | Taizo Maeda, Yohei Koganei | 2017-11-21 |
| 9800347 | Optical transmission device, optical transmission system, and optical transmission control method | Kazuaki Nagamine | 2017-10-24 |
| 9588297 | Wavelength selective switch, variable dispersion compensator, optical transmission apparatus, and optical transmission system | Yuji Kamura | 2017-03-07 |
| 9577781 | Optical transmission apparatus and optical transmission control method | Kazuaki Nagamine | 2017-02-21 |
| 9467244 | Transmission apparatus and transmission system | Kazuaki Nagamine | 2016-10-11 |
| 9379839 | Optical transmission device and optical transmission method | Takuma Shoji | 2016-06-28 |
| 9332326 | Optical transmission device and monitoring method of optical signal | Akihiro Mukai, Takaaki Itose, Hiroki Takaki, Yoshinobu Matsukawa | 2016-05-03 |
| 8948413 | Audio apparatus | Kensaku Abe, Yoshitada Fujiwara | 2015-02-03 |
| 8867922 | Control device of node transferring signal light | — | 2014-10-21 |
| 8554071 | Optical transmission apparatus and continuity testing method | Takuma Shoji | 2013-10-08 |
| 8335320 | Audio apparatus | Kensaku Abe, Yoshitada Fujiwara | 2012-12-18 |
| 8331787 | Optical transmitting apparatus and optical multiplexing unit | Takeshi Noma, Haruki Tanaka, Yoshikazu Nakanishi, Makoto Ohtou, Hideaki Sugiya +1 more | 2012-12-11 |
| 8126331 | Wavelength division multiplexing transmission device and wavelength division multiplexing transmission method | — | 2012-02-28 |
| 8116626 | Optical transmission apparatus and optical attenuation amount control method | Tomoaki Takeyama, Keiko Sasaki, Shinichirou Muro, Etsuko Hayashi | 2012-02-14 |
| 8068730 | Wavelength division multiplex signal monitoring system and wavelength division multiplex transmission device equipped with the same | Yoshito Kachita, Yasushi Sugaya, Ryosuke Goto | 2011-11-29 |
| 8041047 | Plug, sound inputting and outputting apparatus, and noise cancel system | Ryota Matsumoto, Osamu Koshida, Shinya Yudate | 2011-10-18 |
| 7650072 | Method of upgrading optical node, and an optical node apparatus | Miki Onaka, Yasushi Sugaya, Takahumi Terahara, Satoru Okano, Takehiro Fujita +1 more | 2010-01-19 |
| 7553195 | Plug | Ryota Matsumoto, Osamu Koshida, Shinya Yudate | 2009-06-30 |
| 7522839 | Method of upgrading optical node, and an optical node apparatus | Miki Onaka, Yasushi Sugaya, Takahumi Terahara, Satoru Okano, Takehiro Fujita +1 more | 2009-04-21 |
| 7336870 | Optical transmission system | Hiroki Ooi, Akira Miura, Takafumi Terahara | 2008-02-26 |
| 7286758 | Method for switching transmission route, and optical transmission device | Yuji Shimada, Hiroaki Tomofuji, Takuji Maeda, Takeshi Sakamoto | 2007-10-23 |
| 7110674 | Optical add/drop device | Satoshi Kuroyanagi | 2006-09-19 |