Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9369359 | Diagnostic system | Akira Sakurai, Zhenlong Cui | 2016-06-14 |
| 9300558 | Delay measurement system and delay measurement method, as well as delay measurement device and delay measurement program | Zhenlong Cui, Kazuo Takagi | 2016-03-29 |
| 9264332 | Transmission system, transmission device, packet loss ratio measurement method, and packet loss ratio measurement program | Akira Sakurai, Hiroshi Tanaka | 2016-02-16 |
| 8897308 | Node, a monitoring management method used for a node, and a transfer system, an input circuit and an output circuit | Zhenlong Cui, Hiroyuki Takagi, Kazuo Takagi, Akira Sakurai, Hiroshi Tanaka | 2014-11-25 |
| 8737238 | Congestion detecting method and communication node | Zhenlong Cui, Hiroyuki Takagi, Kazuo Takagi | 2014-05-27 |
| 8731036 | Packet filter-based clock synchronization system, apparatus, and method, and program thereof | Zhenlong Cui, Kazuo Takagi | 2014-05-20 |
| 8711686 | Packet transmission system and fault recovery method | Kazuo Takagi, Zhenlong Cui, Akira Sakurai | 2014-04-29 |
| 8675665 | Clock synchronization system, its method and program | Hideo Yoshimi, Zhenlong Cui, Kazuo Takagi, Atsushi Iwata | 2014-03-18 |
| 8565124 | Node, network, correspondence relationship generation method and frame transfer program | Kazuo Takagi, Daisaku Ogasahara, Nobuyuki Enomoto, Youichi Hidaka, Atsushi Iwata | 2013-10-22 |
| 8218446 | Frame transfer route confirmation method, node, frame transfer route confirmation program and frame transfer route confirmation system | Kazuo Takagi | 2012-07-10 |
| 8094584 | Node, network system, frame transfer method, and frame transfer program | Nobuyuki Enomoto, Youichi Hidaka, Daisaku Ogasahara, Kazuo Takagi, Atsushi Iwata | 2012-01-10 |
| 7894374 | Network system, spanning tree configuration method, spanning tree configuration node, and spanning tree configuration program | Nobuyuki Enomoto, Youichi Hidaka, Atsushi Iwata, Makoto Shibutani | 2011-02-22 |
| 7855981 | Network system, spanning tree configuration method, spanning tree configuration node, and spanning tree configuration program | Nobuyuki Enomoto, Youichi Hidaka, Atsushi Iwata, Makoto Shibutani | 2010-12-21 |
| 7783705 | Frame transfer method and node in Ethernet | Youichi Hidaka, Makoto Shibutani, Atsushi Iwata, Nobuyuki Enomoto | 2010-08-24 |
| 7646789 | Communication system including several communication terminals and server, its communication terminal, its server and data transfer control program | Satomi Shioiri, Kazuo Takagi, Makoto Shibutani | 2010-01-12 |
| 7532588 | Network system, spanning tree configuration method and configuration program, and spanning tree configuration node | Nobuyuki Enomoto, Youichi Hidaka, Atsushi Iwata | 2009-05-12 |
| 7324440 | Multiring control method, node using the method, and control program | Kazuo Takagi | 2008-01-29 |
| 7239637 | Packet communication system, network side device and terminal side device thereof and identifier assigning method | — | 2007-07-03 |
| 7200155 | Communication system capable of efficiently transmitting data from terminals to server | Kazuo Takagi, Makoto Shibutani | 2007-04-03 |
| 7012929 | System and method for assigning time slots in communication system and network-side apparatus used therefor | — | 2006-03-14 |
| 6891856 | Delay-compensated timeslot assignment method and system for point-to-multipoint communication networks | — | 2005-05-10 |
| 6747990 | Packet communication system, network-side apparatus to be used therein, and time slot allocation control method | Kazuo Takagi | 2004-06-08 |
| 6542467 | Bandwidth allocation system of virtual path in communication network of asynchronous transfer mode | — | 2003-04-01 |