Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11838103 | Wavelength conversion device and transmission system | Tomoaki Watanabe | 2023-12-05 |
| 9900089 | Optical transmission device and method for checking optical connection in optical transmission device | Masahiro Yuki, Atsushi Kiyama | 2018-02-20 |
| 9520959 | Optical drop apparatus, optical add apparatus, and optical add/drop apparatus | — | 2016-12-13 |
| 9332326 | Optical transmission device and monitoring method of optical signal | Akihiro Mukai, Takaaki Itose, Hiroki Takaki, Ichiro Nakajima | 2016-05-03 |
| 9300426 | Transmission apparatus, transmission system, and method of controlling average optical input power | Norifumi Shukunami, Kosuke Komaki | 2016-03-29 |
| 8699506 | Optical transmission apparatus and optical transmission method | Miwa Taniguchi, Yuji Shimada | 2014-04-15 |
| 8625984 | Transmission device, control device, and method of detecting erroneous connection of signal line | Yuya ISHIDA | 2014-01-07 |
| 8374500 | SONET/SDH transmission apparatus | Hiroshi Yoshida, Yasuhiro Fuchi, Takaaki Itose, Masanori Eiro | 2013-02-12 |
| 8005357 | Optical transmission apparatus | Yoshiyuki Maeda, Hironori Kadota, Taku Yoshida | 2011-08-23 |
| 7991286 | Optical transmission apparatus | Yoshiyuki Maeda, Hironori Kadota, Taku Yoshida | 2011-08-02 |
| 6400729 | Protocol conversion system for data communication between different types of open networks | Toru Shimadoi, Satoshi Nishimura, Taiichirou Sakaguchi, Takashi Fukuda | 2002-06-04 |
| 5805601 | System for controlling signal transfer between a plurality of devices | Shinichi Takeda, Hiroya Egoshi | 1998-09-08 |