Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10644823 | Optical transfer system, control device, optical transfer method, and transfer device | Masahiro Yuki, Tomoaki Takeyama | 2020-05-05 |
| 9264167 | Optical add drop multiplexer | Koji Takeguchi | 2016-02-16 |
| 8977130 | Optical transmission device and optical filter circuit | Koji Takeguchi | 2015-03-10 |
| 8879915 | Optical switching device, optical add device, and optical drop device | Takeshi Sakamoto | 2014-11-04 |
| 7359316 | Reception pointer processing apparatus in SDH transmission system | Kenji Fukunaga, Takumi Iwai, Atsuki Taniguchi | 2008-04-15 |
| 7151783 | Frame synchronous pattern processing apparatus and frame synchronous pattern detection apparatus and method for detecting frame synchronous pattern | Yoshinori Nakamura | 2006-12-19 |
| 6919987 | Light wavelength-multiplexing systems | Yoshinori Tochiki, Kimio Uekama, Takeshi Sakamoto | 2005-07-19 |
| 6441955 | Light wavelength-multiplexing systems | Yoshinori Tochiki, Kimio Uekama, Takeshi Sakamoto | 2002-08-27 |
| 6385213 | Frame synchronous pattern processing apparatus and frame synchronous pattern detection apparatus and method for detecting frame synchronous pattern | Yoshinori Nakamura | 2002-05-07 |
| 6337848 | Path switching device for transmission apparatus | Atsuki Taniguchi | 2002-01-08 |
| 6118795 | Reception pointer processing apparatus in SDH transmission system | Kenji Fukunaga, Takumi Iwai, Atsuki Taniguchi | 2000-09-12 |
| 6009076 | Repeating installation | Katsuichi Ohara, Kanta Yamamoto, Yoshinori Nakamura, Toshihito Echizenya | 1999-12-28 |
| 5909175 | Connection switching circuit for ring system | Shosaku Yamasaki, Atsuki Taniguchi | 1999-06-01 |
| 5844889 | Different system transfer method for a ring transmission system and transmission apparatus | Atsuki Taniguchi | 1998-12-01 |
| 5754545 | Add-drop multiplexer with enhancement of accessibility to signals in different hierarchical levels and flexibility in various services and circuit setting operations | Masahiro Shinbashi, Akihiko Oka, Hideaki Mochizuki, Junichi Ishiwatari, Koji Iwamoto | 1998-05-19 |
| 5557437 | Optical terminal system having self-monitoring function | Toshiharu Sakai, Yoshinori Nakamura, Takashi Umegaki, Nobuo Iguchi, Miki Hagino +4 more | 1996-09-17 |
| 5311501 | Routing system for linear add-drop multiplexer | — | 1994-05-10 |
| 5172260 | Method for phase compensation of optical regenerator equipment | — | 1992-12-15 |
| 5134609 | Drop/insert channel selecting system | Masakazu Mori, Masanori Arai, Naonobu Fujimoto, Nobuhide Yamaguchi | 1992-07-28 |