| 9912527 |
Communication device, communication system, method for determining path, and program |
Kazuo Takagi, Akira Sakurai |
2018-03-06 |
| 9369359 |
Diagnostic system |
Masaki Umayabashi, Akira Sakurai |
2016-06-14 |
| 9300558 |
Delay measurement system and delay measurement method, as well as delay measurement device and delay measurement program |
Masaki Umayabashi, Kazuo Takagi |
2016-03-29 |
| 8897308 |
Node, a monitoring management method used for a node, and a transfer system, an input circuit and an output circuit |
Hiroyuki Takagi, Masaki Umayabashi, Kazuo Takagi, Akira Sakurai, Hiroshi Tanaka |
2014-11-25 |
| 8737401 |
Communication using MPLS-ARP messaging |
Kazuo Takagi, Akira Sakurai |
2014-05-27 |
| 8737238 |
Congestion detecting method and communication node |
Masaki Umayabashi, Hiroyuki Takagi, Kazuo Takagi |
2014-05-27 |
| 8731036 |
Packet filter-based clock synchronization system, apparatus, and method, and program thereof |
Masaki Umayabashi, Kazuo Takagi |
2014-05-20 |
| 8711686 |
Packet transmission system and fault recovery method |
Kazuo Takagi, Masaki Umayabashi, Akira Sakurai |
2014-04-29 |
| 8693338 |
Quality measuring system, quality measuring apparatus, quality measuring method, and program |
Ryuichi Ikematsu, Hiroyuki Takagi, Kazuo Takagi |
2014-04-08 |
| 8675665 |
Clock synchronization system, its method and program |
Masaki Umayabashi, Hideo Yoshimi, Kazuo Takagi, Atsushi Iwata |
2014-03-18 |
| 7831715 |
Communication system, communication method, and program |
Hideo Yoshimi, Nobuyuki Enomoto, Kazuo Takagi, Atsushi Iwata |
2010-11-09 |