Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8891716 | Node device and method for synchronizing clock times | Yuji Takahashi, Kouki Shigaki, Tadashige Iwao | 2014-11-18 |
| 8412045 | Propagation apparatus and dispersion value setting method | Yuki Murakami, Toshiyuki Hisano, Akihiro Horiuchi | 2013-04-02 |
| 8195052 | Optical wavelength multiplexing system, optical wavelength multiplexing method, and computer product | Makoto Ohtou, Akira Yamamoto, Tatsuo Nagayoshi, Hideaki Sugiya | 2012-06-05 |
| 8189180 | Optical fiber transmission line measurement apparatus and system | Koji Bato, Taro Asao, Yoshinori Tochiki, Haruka Miyazaki, Akira Yamamoto +2 more | 2012-05-29 |
| 7733467 | Optical passive device product identification apparatus and connectivity determination apparatus | Tatsuo Nagayoshi, Akira Yamamoto, Makoto Ohtou, Takuji Maeda | 2010-06-08 |
| 6041062 | High-speed synchronous multiplexing apparatus | Seiichi Yamato, Noboru Kamei, Kazuyoshi Okuma, Hironori Kadota, Tomoyuki Sakata | 2000-03-21 |