Kazuo Takagi

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Extraction, conversion, and transmission of user packet from encaps...
- Patent number 11,523,443
- Issue date Dec 6, 2022
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication device, communication system, method for determining...
- Patent number 9,912,527
- Issue date Mar 6, 2018
- NEC Corporation
- Zhenlong Cui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adding link aggregation group to hitless protection in packet switc...
- Patent number 9,537,757
- Issue date Jan 3, 2017
- NEC Corporation
- Junqiang Hu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
End-to-end hitless protection in packet switched networks
- Patent number 9,369,409
- Issue date Jun 14, 2016
- NEC Corporation
- Junqiang Hu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Delay measurement system and delay measurement method, as well as d...
- Patent number 9,300,558
- Issue date Mar 29, 2016
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system
- Patent number 9,215,167
- Issue date Dec 15, 2015
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Node, a monitoring management method used for a node, and a transfe...
- Patent number 8,897,308
- Issue date Nov 25, 2014
- NEC Corporation
- Zhenlong Cui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Clock synchronization system, node, clock synchronization method, a...
- Patent number 8,824,511
- Issue date Sep 2, 2014
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Congestion detecting method and communication node
- Patent number 8,737,238
- Issue date May 27, 2014
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication using MPLS-ARP messaging
- Patent number 8,737,401
- Issue date May 27, 2014
- NEC Corporation
- Zhenlong Cui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet filter-based clock synchronization system, apparatus, and me...
- Patent number 8,731,036
- Issue date May 20, 2014
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet transmission system and fault recovery method
- Patent number 8,711,686
- Issue date Apr 29, 2014
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Quality measuring system, quality measuring apparatus, quality meas...
- Patent number 8,693,338
- Issue date Apr 8, 2014
- NEC Corporation
- Ryuichi Ikematsu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Clock synchronization system, its method and program
- Patent number 8,675,665
- Issue date Mar 18, 2014
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Node, network, correspondence relationship generation method and fr...
- Patent number 8,565,124
- Issue date Oct 22, 2013
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frame transfer route confirmation method, node, frame transfer rout...
- Patent number 8,218,446
- Issue date Jul 10, 2012
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Node, network system, frame transfer method, and frame transfer pro...
- Patent number 8,094,584
- Issue date Jan 10, 2012
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ring network system, failure recovery method, failure detection met...
- Patent number 7,898,942
- Issue date Mar 1, 2011
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for transmission of data in packet ring network s...
- Patent number 7,848,340
- Issue date Dec 7, 2010
- NEC Corporation
- Masahiro Sakauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system, communication method, and program
- Patent number 7,831,715
- Issue date Nov 9, 2010
- NEC Corporation
- Hideo Yoshimi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system including several communication terminals and...
- Patent number 7,646,789
- Issue date Jan 12, 2010
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet protection method and transmission device in ring network, a...
- Patent number 7,385,918
- Issue date Jun 10, 2008
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiring control method, node using the method, and control program
- Patent number 7,324,440
- Issue date Jan 29, 2008
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system capable of efficiently transmitting data from...
- Patent number 7,200,155
- Issue date Apr 3, 2007
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for transmission and reception of asynchronously...
- Patent number 7,126,950
- Issue date Oct 24, 2006
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Accommodation frame and transmission device of different data traff...
- Patent number 7,075,944
- Issue date Jul 11, 2006
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission method and network system for accommodating a pluralit...
- Patent number 6,947,427
- Issue date Sep 20, 2005
- NEC Corporation
- Yoshinori Rokugo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet communication system, network-side apparatus to be used ther...
- Patent number 6,747,990
- Issue date Jun 8, 2004
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ATM switching system with distribution networks for varying traffic...
- Patent number 5,907,551
- Issue date May 25, 1999
- NEC Corporation
- Makoto Nishio
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cable mounting structure for automatic transmission
- Patent number 5,352,853
- Issue date Oct 4, 1994
- Jatco Corporation
- Kazuo Takagi
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
COMMUNICATION SYSTEM AND COMMUNICATION METHOD
- Publication number 20210112607
- Publication date Apr 15, 2021
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM, CONTROL APPARATUS, COMMUNICATION APPARATUS, A...
- Publication number 20170078193
- Publication date Mar 16, 2017
- NEC Corporation
- Zhenlong CUI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION DEVICE, COMMUNICATION SYSTEM, METHOD FOR DETERMINING...
- Publication number 20150207673
- Publication date Jul 23, 2015
- NEC Corporation
- Zhenlong Cui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Eliminating External Buffer for Hitless Protection by Using Channel...
- Publication number 20150085647
- Publication date Mar 26, 2015
- NEC Laboratories America, Inc.
- Junqiang Hu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
END-TO-END HITLESS PROTECTION IN PACKET SWITCHED NETWORKS
- Publication number 20150043330
- Publication date Feb 12, 2015
- NEC Laboratories America, Inc.
- Junqiang HU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ADDING LINK AGGREGATION GROUP TO HITLESS PROTECTION IN PACKET SWITC...
- Publication number 20150043331
- Publication date Feb 12, 2015
- NEC Laboratories America, Inc.
- Junqiang HU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NETWORK SYSTEM
- Publication number 20140219285
- Publication date Aug 7, 2014
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DELAY MEASUREMENT SYSTEM AND DELAY MEASUREMENT METHOD, AS WELL AS D...
- Publication number 20130170390
- Publication date Jul 4, 2013
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NODE, A MONITORING MANAGEMENT METHOD USED FOR IT, AND A TRANSFER SY...
- Publication number 20120219003
- Publication date Aug 30, 2012
- NEC Corporation
- Zhenlong Cui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
A COMMUNICATION APPARATUS, A COMMUNICATION SYSTEM AND A COMMUNICATI...
- Publication number 20120189011
- Publication date Jul 26, 2012
- ZHENLONG CUI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CONGESTION DETECTING METHOD AND COMMUNICATION NODE
- Publication number 20120113820
- Publication date May 10, 2012
- NEC Corporation
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PACKET TRANSMISSION SYSTEM AND FAULT RECOVERY METHOD
- Publication number 20120051214
- Publication date Mar 1, 2012
- KAZUO TAKAGI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION APPARATUS, COMMUNICATION SYSTEM AND COMMUNICATION METHOD
- Publication number 20120020232
- Publication date Jan 26, 2012
- DAISUKE YOSHIOKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PACKET-FILTER-USED CLOCK SYNCHRONIZATION SYSTEM, APPARATUS, METHOD...
- Publication number 20110228834
- Publication date Sep 22, 2011
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CLOCK SYNCHRONIZATION SYSTEM, NODE, CLOCK SYNCHRONIZATION METHOD, A...
- Publication number 20110006818
- Publication date Jan 13, 2011
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CLOCK SYNCHRONIZATION SYSTEM, ITS METHOD AND PROGRAM
- Publication number 20100309934
- Publication date Dec 9, 2010
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NODE, NETWORK SYSTEM, FRAME TRANSFER METHOD, AND FRAME TRANSFER PRO...
- Publication number 20100232322
- Publication date Sep 16, 2010
- NEC CORPORATION
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
QUALITY MEASURING SYSTEM, QUALITY MEASURING APPARATUS, QUALITY MEAS...
- Publication number 20100220612
- Publication date Sep 2, 2010
- Ryuichi Ikematsu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TERMINAL, SECURITY SETTING METHOD, AND PROGRAM THEREOF
- Publication number 20100154049
- Publication date Jun 17, 2010
- NEC Corporation
- Hideo Yoshimi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MOBILE TERMINAL, STORE-AND-FORWARD MULTIHOP COMMUNICATION METHOD AN...
- Publication number 20090305708
- Publication date Dec 10, 2009
- Junichiro Matsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TELEPHONE SYSTEM, POSITIONAL INFORMATION SERVER, TELEPHONE EXCHANGE...
- Publication number 20090268891
- Publication date Oct 29, 2009
- Junichiro Matsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CLOCK SYNCHRONIZATION SYSTEM
- Publication number 20090257458
- Publication date Oct 15, 2009
- NEC Corporation
- Zhenlong Cui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FRAME TRANSFER ROUTE CONFIRMATION METHOD, NODE, FRAME TRANSFER ROUT...
- Publication number 20090122800
- Publication date May 14, 2009
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Ring Network System, Failure Recovery Method, Failure Detection Met...
- Publication number 20090052317
- Publication date Feb 26, 2009
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PACKET RING NETWORK SYSTEM, METHOD OF CONNECTING PACKET RINGS, AND...
- Publication number 20090022168
- Publication date Jan 22, 2009
- NEC Corporation
- Masahiro Sakauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RELAY APPARATUS, PATH SELECTION SYSTEM, PATH SELECTION METHOD AND...
- Publication number 20080219168
- Publication date Sep 11, 2008
- NEC Corporation
- Nobuyuki ENOMOTO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Node, Network, Correspondence Relationship Generation Method and Fr...
- Publication number 20080165705
- Publication date Jul 10, 2008
- Masaki Umayabashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multiring control method, node using the method, and control program
- Publication number 20080159126
- Publication date Jul 3, 2008
- NEC Corporation
- Kazuo Takagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND PROGRAM
- Publication number 20080008170
- Publication date Jan 10, 2008
- NEC Corporation
- Hideo YOSHIMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ESTIMATING SYSTEM, TERMINAL, ESTIMATING METHOD, AND PROGRAM
- Publication number 20070171836
- Publication date Jul 26, 2007
- NEC Corporation
- Hideo Yoshimi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Kazuo Takagi

Person

Patents Grantslast 30 patents

Extraction, conversion, and transmission of user packet from encaps...

Communication device, communication system, method for determining...

Adding link aggregation group to hitless protection in packet switc...

End-to-end hitless protection in packet switched networks

Delay measurement system and delay measurement method, as well as d...

Network system

Node, a monitoring management method used for a node, and a transfe...

Clock synchronization system, node, clock synchronization method, a...

Congestion detecting method and communication node

Communication using MPLS-ARP messaging

Packet filter-based clock synchronization system, apparatus, and me...

Packet transmission system and fault recovery method

Quality measuring system, quality measuring apparatus, quality meas...

Clock synchronization system, its method and program

Node, network, correspondence relationship generation method and fr...

Frame transfer route confirmation method, node, frame transfer rout...

Node, network system, frame transfer method, and frame transfer pro...

Ring network system, failure recovery method, failure detection met...

System and method for transmission of data in packet ring network s...

Communication system, communication method, and program

Communication system including several communication terminals and...

Packet protection method and transmission device in ring network, a...

Multiring control method, node using the method, and control program

Communication system capable of efficiently transmitting data from...

Method and system for transmission and reception of asynchronously...

Accommodation frame and transmission device of different data traff...

Transmission method and network system for accommodating a pluralit...

Packet communication system, network-side apparatus to be used ther...

ATM switching system with distribution networks for varying traffic...

Cable mounting structure for automatic transmission

Patents Applicationslast 30 patents

COMMUNICATION SYSTEM AND COMMUNICATION METHOD

COMMUNICATION SYSTEM, CONTROL APPARATUS, COMMUNICATION APPARATUS, A...

COMMUNICATION DEVICE, COMMUNICATION SYSTEM, METHOD FOR DETERMINING...

Eliminating External Buffer for Hitless Protection by Using Channel...

END-TO-END HITLESS PROTECTION IN PACKET SWITCHED NETWORKS

ADDING LINK AGGREGATION GROUP TO HITLESS PROTECTION IN PACKET SWITC...

NETWORK SYSTEM

DELAY MEASUREMENT SYSTEM AND DELAY MEASUREMENT METHOD, AS WELL AS D...

NODE, A MONITORING MANAGEMENT METHOD USED FOR IT, AND A TRANSFER SY...

A COMMUNICATION APPARATUS, A COMMUNICATION SYSTEM AND A COMMUNICATI...

CONGESTION DETECTING METHOD AND COMMUNICATION NODE

PACKET TRANSMISSION SYSTEM AND FAULT RECOVERY METHOD

COMMUNICATION APPARATUS, COMMUNICATION SYSTEM AND COMMUNICATION METHOD

PACKET-FILTER-USED CLOCK SYNCHRONIZATION SYSTEM, APPARATUS, METHOD...

CLOCK SYNCHRONIZATION SYSTEM, NODE, CLOCK SYNCHRONIZATION METHOD, A...

CLOCK SYNCHRONIZATION SYSTEM, ITS METHOD AND PROGRAM

NODE, NETWORK SYSTEM, FRAME TRANSFER METHOD, AND FRAME TRANSFER PRO...

QUALITY MEASURING SYSTEM, QUALITY MEASURING APPARATUS, QUALITY MEAS...

TERMINAL, SECURITY SETTING METHOD, AND PROGRAM THEREOF

MOBILE TERMINAL, STORE-AND-FORWARD MULTIHOP COMMUNICATION METHOD AN...

TELEPHONE SYSTEM, POSITIONAL INFORMATION SERVER, TELEPHONE EXCHANGE...

CLOCK SYNCHRONIZATION SYSTEM

FRAME TRANSFER ROUTE CONFIRMATION METHOD, NODE, FRAME TRANSFER ROUT...

Ring Network System, Failure Recovery Method, Failure Detection Met...

PACKET RING NETWORK SYSTEM, METHOD OF CONNECTING PACKET RINGS, AND...

RELAY APPARATUS, PATH SELECTION SYSTEM, PATH SELECTION METHOD AND...

Node, Network, Correspondence Relationship Generation Method and Fr...

Multiring control method, node using the method, and control program

COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND PROGRAM

ESTIMATING SYSTEM, TERMINAL, ESTIMATING METHOD, AND PROGRAM