Issued Patents All Time
Showing 1–25 of 65 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8948595 | Passive optical network system, optical line terminal, and optical network unit | Toyomi Teramoto, Makoto Matsuoka | 2015-02-03 |
| 8886041 | Optical line terminal, bandwidth control method and optical network system | Takahiro Tanaka, Shota TAKAGI | 2014-11-11 |
| 8861954 | Burst-mode receiver equipped with optical amplifier, method for controlling optical amplifier, and system | Jun Sugawa, Hiroki Ikeda | 2014-10-14 |
| 8811819 | Optical multiplexing terminal device, wavelength multiplexing passive optical network system and downlink wavelength transmission method | Norihiro Sakamoto, Masaki Ohira | 2014-08-19 |
| 8798460 | Optical access system, optical network unit, and optical line terminal | Satoshi Konno, Noboru Oosawa | 2014-08-05 |
| 8724995 | Passive optical network system and operating method thereof | Akihiko Tsuchiya, Norihiro Sakamoto, Yusuke Yajima, Masatoshi Takihiro | 2014-05-13 |
| 8712244 | Communication system and time synchronization method | Makoto Hasegawa, Kazuyori UMEMATSU, Atsushi Otani | 2014-04-29 |
| 8705965 | Method of recovery from sleep state of an ONU in a PON system capable of power saving | Jun Sugawa, Hiroki Ikeda | 2014-04-22 |
| 8654766 | System apparatus and method for interconnecting TDM and frame/packet communication networks | Masahiko Mizutani, Yoshihiro Ashi, Masayuki Takase, Atsushi Iwamura, Akihiko Tanaka +1 more | 2014-02-18 |
| 8532491 | Optical multiplexing terminating device, passive optical network system and method for allocating wavelength | Norihiro Sakamoto, Yusuke Yajima, Akihiko Tsuchiya | 2013-09-10 |
| 8477800 | Passive optical network system and operation method thereof | Norihiro Sakamoto, Masaki Ohira | 2013-07-02 |
| 8467684 | Apparatus of adjusting optical signal transmission timing | Masaki Ohira, Yusuke Yajima, Akihiko Tsuchiya, Yoshinobu Morita | 2013-06-18 |
| 8457492 | Optical access system | Masaki Ohira, Yusuke Yajima, Akihiko Tsuchiya | 2013-06-04 |
| 8374503 | Passive optical network system and optical line terminal | Norihiro Sakamoto, Yusuke Yajima | 2013-02-12 |
| 8374504 | Optical communication system | Masahiko Mizutani, Yoshihiro Ashi, Shinya Sasaki | 2013-02-12 |
| 8331400 | Passive optical network (PON) system | Masahiko Mizutani, Takeshi Shibata, Yoshihiro Ashi, Masanobu Kobayashi, Hideki Endo | 2012-12-11 |
| 8290369 | Optical access system | Kenichi Sakamoto, Yoshihiro Ashi, Ryosuke Nishino, Masayuki Takase, Masahiko Mizutani | 2012-10-16 |
| 8280055 | Optical network system and method of changing encryption keys | Taiki Nema, Ryosuke Kurata | 2012-10-02 |
| 8260135 | Passive optical network system and wavelength assignment method | Kenichi Sakamoto, Ryosuke Nishino | 2012-09-04 |
| 8249454 | Optical communication system and optical line terminating apparatus | Toshiki Sugawara, Yusuke Yajima | 2012-08-21 |
| 8249455 | Passive optical network system and ranging method | Yusuke Yajima, Masaki Oohira | 2012-08-21 |
| 8224135 | Optical communication system using WDMA and CDMA | Masahiko Mizutani, Toshiki Sugawara, Yoshihiro Ashi | 2012-07-17 |
| 8204168 | Bit synchronization circuit with phase tracking function | Yusuke Yajima, Yoshihiro Ashi | 2012-06-19 |
| 8189571 | System apparatus and method for interconnecting TDM and frame/packet communication networks | Masahiko Mizutani, Yoshihiro Ashi, Masayuki Takase, Atsushi Iwamura, Akihiko Tanaka +1 more | 2012-05-29 |
| 8184977 | Optical line terminal capable of active bandwidth allocation for passive optical network system | Kenichi Sakamoto, Ryosuke Nishino | 2012-05-22 |