Yoshihiro ASHI

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Data transport system, transmission method, and transport apparatus
- Patent number 9,491,000
- Issue date Nov 8, 2016
- Hitachi, Ltd.
- Kiyotaka Takahashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and time synchronization method
- Patent number 9,407,389
- Issue date Aug 2, 2016
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system, path switching method and communication device
- Patent number 9,385,944
- Issue date Jul 5, 2016
- Hitachi, Ltd.
- Masayuki Takase
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and its device
- Patent number 9,379,877
- Issue date Jun 28, 2016
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission network system, transmission method, and authenticatio...
- Patent number 9,350,746
- Issue date May 24, 2016
- Hitachi, Ltd.
- Shinya Fujioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system and communication device
- Patent number 9,112,927
- Issue date Aug 18, 2015
- Hitachi, Ltd.
- Kiyotaka Takahashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and communication device
- Patent number 9,083,602
- Issue date Jul 14, 2015
- Hitachi, Ltd.
- Hideki Endo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Shelf of a network synchronization device, and network synchronizat...
- Patent number 8,995,471
- Issue date Mar 31, 2015
- Hitachi, Ltd.
- Nobuyuki Yamamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet transfer apparatus
- Patent number 8,948,201
- Issue date Feb 3, 2015
- Hitachi, Ltd.
- Masayuki Takase
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for identifier management
- Patent number 8,886,913
- Issue date Nov 11, 2014
- Hitachi, Ltd.
- Kenji Fujihira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system and communication device
- Patent number 8,817,794
- Issue date Aug 26, 2014
- Hitachi, Ltd.
- Kiyotaka Takahashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system, edge node, and access device
- Patent number 8,675,506
- Issue date Mar 18, 2014
- Hitachi, Ltd.
- Masayuki Takase
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transfer apparatus, transfer network system, and transfer method
- Patent number 8,667,058
- Issue date Mar 4, 2014
- Hitachi, Ltd.
- Shinya Fujioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System apparatus and method for interconnecting TDM and frame/packe...
- Patent number 8,654,766
- Issue date Feb 18, 2014
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission device with function of packetizing and transmitting
- Patent number 8,634,426
- Issue date Jan 21, 2014
- Hitachi, Ltd.
- Yoshio Nogi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet transfer apparatus
- Patent number 8,588,251
- Issue date Nov 19, 2013
- Hitachi, Ltd.
- Masayuki Takase
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system, subscriber accommodating apparatus and commun...
- Patent number 8,554,075
- Issue date Oct 8, 2013
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet transfer device and packet transfer method
- Patent number 8,503,325
- Issue date Aug 6, 2013
- Hitachi, Ltd.
- Kazuhiro Watanabe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet transfer apparatus and packet transfer method
- Patent number 8,457,012
- Issue date Jun 4, 2013
- Hitachi, Ltd.
- Hideki Endo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication system
- Patent number 8,374,504
- Issue date Feb 12, 2013
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network (PON) system
- Patent number 8,331,400
- Issue date Dec 11, 2012
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system and data transfer device
- Patent number 8,305,907
- Issue date Nov 6, 2012
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical access system
- Patent number 8,290,369
- Issue date Oct 16, 2012
- Hitachi, Ltd.
- Kenichi Sakamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and fault determination method
- Patent number 8,254,780
- Issue date Aug 28, 2012
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication system using WDMA and CDMA
- Patent number 8,224,135
- Issue date Jul 17, 2012
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Bit synchronization circuit with phase tracking function
- Patent number 8,204,168
- Issue date Jun 19, 2012
- Hitachi, Ltd.
- Yusuke Yajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System apparatus and method for interconnecting TDM and frame/packe...
- Patent number 8,189,571
- Issue date May 29, 2012
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system and node
- Patent number 8,169,895
- Issue date May 1, 2012
- Hitachi, Ltd.
- Masayuki Takase
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
PON system
- Patent number 8,098,678
- Issue date Jan 17, 2012
- Hitachi, Ltd.
- Hideki Endo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multicast path management and protection
- Patent number 8,089,865
- Issue date Jan 3, 2012
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
COMMUNICATION SYSTEM, CONTROL APPARATUS AND COMMUNICATION APPARATUS
- Publication number 20160021005
- Publication date Jan 21, 2016
- Hitachi, Ltd
- Takeshi KIYOSE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION NETWORK AND TRANSMISSION NETWORK MANAGEMENT SYSTEM
- Publication number 20150103643
- Publication date Apr 16, 2015
- Hitachi, Ltd
- Shinya Fujioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM AND TIME SYNCHRONIZATION METHOD
- Publication number 20150085852
- Publication date Mar 26, 2015
- Hitachi, Ltd
- Masahiko MIZUTANI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DATA TRANSPORT SYSTEM, TRANSMISSION METHOD, AND TRANSPORT APPARATUS
- Publication number 20150010009
- Publication date Jan 8, 2015
- Hitachi, Ltd
- Kiyotaka TAKAHASHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION NETWORK SYSTEM, TRANSMISSION METHOD, AND AUTHENTICATIO...
- Publication number 20140215566
- Publication date Jul 31, 2014
- Shinya FUJIOKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM, COMMUNICATION PATH ESTABLISHING METHOD AND MA...
- Publication number 20140185607
- Publication date Jul 3, 2014
- Hitachi, Ltd
- Daisuke MASHIMO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM, PATH SWITCHING METHOD AND COMMUNICATION DEVICE
- Publication number 20140185429
- Publication date Jul 3, 2014
- Hitachi, Ltd
- Masayuki TAKASE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD FOR MONITORING CONNECTIVITY BY MEANS OF SUBSCRIBER TERMINAL...
- Publication number 20140098676
- Publication date Apr 10, 2014
- Hitachi, Ltd
- Akihiko Tsuchiya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NETWORK SYSTEM, TRANSMISSION DEVICE, AND FAULT INFORMATION DELIVERY...
- Publication number 20140086040
- Publication date Mar 27, 2014
- Kiyotaka TAKAHASHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Packet Transfer Apparatus
- Publication number 20140036923
- Publication date Feb 6, 2014
- Hitachi, Ltd
- Masayuki TAKASE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NETWORK SYSTEM AND COMMUNICATION DEVICE
- Publication number 20130315251
- Publication date Nov 28, 2013
- Hitachi, Ltd
- KIYOTAKA TAKAHASHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION NETWORK AND TRANSMISSION NETWORK MANAGEMENT SYSTEM
- Publication number 20130182559
- Publication date Jul 18, 2013
- Hitachi, Ltd.
- Shinya Fujioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM AND ITS DEVICE
- Publication number 20130077633
- Publication date Mar 28, 2013
- Hitachi, Ltd
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSFER APPARATUS, TRANSFER NETWORK SYSTEM, AND TRANSFER METHOD
- Publication number 20120331043
- Publication date Dec 27, 2012
- Shinya FUJIOKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Apparatus and Method for Identifier Management
- Publication number 20120294307
- Publication date Nov 22, 2012
- Hitachi, Ltd
- Kenji FUJIHIRA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SHELF OF A NETWORK SYNCHRONIZATION DEVICE, AND NETWORK SYNCHRONIZAT...
- Publication number 20120275473
- Publication date Nov 1, 2012
- Hitachi, Ltd
- Nobuyuki YAMAMOTO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Network System and Communication Device
- Publication number 20120243543
- Publication date Sep 27, 2012
- Hitachi, Ltd
- Kiyotaka Takahashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM AND COMMUNICATION DEVICE
- Publication number 20120236866
- Publication date Sep 20, 2012
- Hitachi, Ltd
- Hideki Endo
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD OF CONNECTIVITY MONITORING BY SUBSCRIBER LINE TERMINATING AP...
- Publication number 20120224488
- Publication date Sep 6, 2012
- Masao NIIBE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
System Apparatus and Method for Interconnecting TDM and Frame/Packe...
- Publication number 20120219006
- Publication date Aug 30, 2012
- HITACHI, LTD.
- Masahiko MIZUTANI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PACKET TRANSFER DEVICE AND PACKET TRANSFER METHOD
- Publication number 20120127877
- Publication date May 24, 2012
- Hitachi, Ltd
- Kazuhiro WATANABE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE
- Publication number 20120027023
- Publication date Feb 2, 2012
- Hitachi, Ltd.
- Yoshio Nogi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM, SUBSCRIBER ACCOMMODATING APPARATUS AND COMMUN...
- Publication number 20110268435
- Publication date Nov 3, 2011
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Packet transfer apparatus
- Publication number 20110096794
- Publication date Apr 28, 2011
- Hitachi Communication Technologies, Ltd.
- Masayuki Takase
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Network System
- Publication number 20100226244
- Publication date Sep 9, 2010
- Hitachi Communication Technologies, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL COMMUNICATION SYSTEM USING WDMA AND CDMA
- Publication number 20100158527
- Publication date Jun 24, 2010
- Hitachi, Ltd
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Passive optical network (PON) system
- Publication number 20100150554
- Publication date Jun 17, 2010
- Hitachi, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL COMMUNICATION SYSTEM
- Publication number 20100086304
- Publication date Apr 8, 2010
- Hitachi Communication Technologies, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Passive optical network system and fault determination method
- Publication number 20100067901
- Publication date Mar 18, 2010
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PON SYSTEM AND OPTICAL NETWORK UNIT
- Publication number 20100067910
- Publication date Mar 18, 2010
- Hitachi Communication Technologies, Ltd.
- Masahiko Mizutani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Yoshihiro ASHI

Person

Patents Grantslast 30 patents

Data transport system, transmission method, and transport apparatus

Communication system and time synchronization method

Communication system, path switching method and communication device

Communication system and its device

Transmission network system, transmission method, and authenticatio...

Network system and communication device

Communication system and communication device

Shelf of a network synchronization device, and network synchronizat...

Packet transfer apparatus

Apparatus and method for identifier management

Network system and communication device

Network system, edge node, and access device

Transfer apparatus, transfer network system, and transfer method

System apparatus and method for interconnecting TDM and frame/packe...

Transmission device with function of packetizing and transmitting

Packet transfer apparatus

Communication system, subscriber accommodating apparatus and commun...

Packet transfer device and packet transfer method

Packet transfer apparatus and packet transfer method

Optical communication system

Passive optical network (PON) system

Network system and data transfer device

Optical access system

Passive optical network system and fault determination method

Optical communication system using WDMA and CDMA

Bit synchronization circuit with phase tracking function

System apparatus and method for interconnecting TDM and frame/packe...

Network system and node

PON system

Multicast path management and protection

Patents Applicationslast 30 patents

COMMUNICATION SYSTEM, CONTROL APPARATUS AND COMMUNICATION APPARATUS

TRANSMISSION NETWORK AND TRANSMISSION NETWORK MANAGEMENT SYSTEM

COMMUNICATION SYSTEM AND TIME SYNCHRONIZATION METHOD

DATA TRANSPORT SYSTEM, TRANSMISSION METHOD, AND TRANSPORT APPARATUS

TRANSMISSION NETWORK SYSTEM, TRANSMISSION METHOD, AND AUTHENTICATIO...

COMMUNICATION SYSTEM, COMMUNICATION PATH ESTABLISHING METHOD AND MA...

COMMUNICATION SYSTEM, PATH SWITCHING METHOD AND COMMUNICATION DEVICE

METHOD FOR MONITORING CONNECTIVITY BY MEANS OF SUBSCRIBER TERMINAL...

NETWORK SYSTEM, TRANSMISSION DEVICE, AND FAULT INFORMATION DELIVERY...

Packet Transfer Apparatus

NETWORK SYSTEM AND COMMUNICATION DEVICE

TRANSMISSION NETWORK AND TRANSMISSION NETWORK MANAGEMENT SYSTEM

COMMUNICATION SYSTEM AND ITS DEVICE

TRANSFER APPARATUS, TRANSFER NETWORK SYSTEM, AND TRANSFER METHOD

Apparatus and Method for Identifier Management

SHELF OF A NETWORK SYNCHRONIZATION DEVICE, AND NETWORK SYNCHRONIZAT...

Network System and Communication Device

COMMUNICATION SYSTEM AND COMMUNICATION DEVICE

METHOD OF CONNECTIVITY MONITORING BY SUBSCRIBER LINE TERMINATING AP...

System Apparatus and Method for Interconnecting TDM and Frame/Packe...

PACKET TRANSFER DEVICE AND PACKET TRANSFER METHOD

TRANSMISSION DEVICE

COMMUNICATION SYSTEM, SUBSCRIBER ACCOMMODATING APPARATUS AND COMMUN...

Packet transfer apparatus

Network System

OPTICAL COMMUNICATION SYSTEM USING WDMA AND CDMA

Passive optical network (PON) system

OPTICAL COMMUNICATION SYSTEM

Passive optical network system and fault determination method

PON SYSTEM AND OPTICAL NETWORK UNIT