Issued Patents All Time
Showing 1–25 of 89 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9491000 | Data transport system, transmission method, and transport apparatus | Kiyotaka Takahashi | 2016-11-08 |
| 9407389 | Communication system and time synchronization method | Masahiko Mizutani, Hiroaki Nakazawa, Daiji MITSUNAGA, Hideyuki Nakanishi | 2016-08-02 |
| 9385944 | Communication system, path switching method and communication device | Masayuki Takase, Hideki Endo, Taisuke UETA | 2016-07-05 |
| 9379877 | Communication system and its device | Masahiko Mizutani | 2016-06-28 |
| 9350746 | Transmission network system, transmission method, and authentication information device | Shinya Fujioka, Masahiko Mizutani | 2016-05-24 |
| 9112927 | Network system and communication device | Kiyotaka Takahashi | 2015-08-18 |
| 9083602 | Communication system and communication device | Hideki Endo, Taisuke UETA, Norio Miyazaki | 2015-07-14 |
| 8995471 | Shelf of a network synchronization device, and network synchronization device | Nobuyuki Yamamoto, Masafumi Kamakura | 2015-03-31 |
| 8948201 | Packet transfer apparatus | Masayuki Takase, Hideki Endo, Takayuki Kanno, Akihiko Tanaka, Nobuyuki Yamamoto | 2015-02-03 |
| 8886913 | Apparatus and method for identifier management | Kenji FUJIHIRA, Masayuki Takase | 2014-11-11 |
| 8817794 | Network system and communication device | Kiyotaka Takahashi, Takumi Oishi | 2014-08-26 |
| 8675506 | Network system, edge node, and access device | Masayuki Takase, Hideki Endo, Nobuyuki Yamamoto | 2014-03-18 |
| 8667058 | Transfer apparatus, transfer network system, and transfer method | Shinya Fujioka, Masahiko Mizutani | 2014-03-04 |
| 8654766 | System apparatus and method for interconnecting TDM and frame/packet communication networks | Masahiko Mizutani, Masayuki Takase, Atsushi Iwamura, Akihiko Tanaka, Hideki Endo +1 more | 2014-02-18 |
| 8634426 | Transmission device with function of packetizing and transmitting | Yoshio Nogi, Masatoshi Shibasaki, Naohiro Sakakida, Kazutaka Sakai | 2014-01-21 |
| 8588251 | Packet transfer apparatus | Masayuki Takase, Hideki Endo, Takayuki Kanno, Akihiko Tanaka, Nobuyuki Yamamoto | 2013-11-19 |
| 8554075 | Communication system, subscriber accommodating apparatus and communication method | Masahiko Mizutani, Yusuke Yajima, Nobuyuki Yamamoto | 2013-10-08 |
| 8503325 | Packet transfer device and packet transfer method | Kazuhiro Watanabe, Takayuki Kanno, Masayuki Takase | 2013-08-06 |
| 8457012 | Packet transfer apparatus and packet transfer method | Hideki Endo, Masayuki Takase, Shikou Matsushima, Akihiko Tanaka, Takayuki Kanno | 2013-06-04 |
| 8374504 | Optical communication system | Masahiko Mizutani, Shinya Sasaki, Tohru Kazawa | 2013-02-12 |
| 8331400 | Passive optical network (PON) system | Masahiko Mizutani, Takeshi Shibata, Tohru Kazawa, Masanobu Kobayashi, Hideki Endo | 2012-12-11 |
| 8305907 | Network system and data transfer device | Masahiko Mizutani, Atsushi Iwamura, Kenichi Sakamoto | 2012-11-06 |
| 8290369 | Optical access system | Kenichi Sakamoto, Tohru Kazawa, Ryosuke Nishino, Masayuki Takase, Masahiko Mizutani | 2012-10-16 |
| 8254780 | Passive optical network system and fault determination method | Masahiko Mizutani, Yusuke Yajima | 2012-08-28 |
| 8224135 | Optical communication system using WDMA and CDMA | Masahiko Mizutani, Toshiki Sugawara, Tohru Kazawa | 2012-07-17 |