Tomoaki Utsumi

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Switching unit or switching gear
- Patent number 9,437,380
- Issue date Sep 6, 2016
- Hitachi, Ltd.
- Miki Yamazaki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Switch unit and switchgear
- Patent number 8,975,550
- Issue date Mar 10, 2015
- Hitachi, Ltd.
- Daisuke Sugai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Switch unit and switchgear equipped therewith
- Patent number 8,872,054
- Issue date Oct 28, 2014
- Hitachi, Ltd.
- Miki Yamazaki
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Switchgear and method for operating switchgear
- Patent number 8,710,388
- Issue date Apr 29, 2014
- Hitachi, Ltd.
- Tomoaki Utsumi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Vacuum switchgear
- Patent number 8,247,725
- Issue date Aug 21, 2012
- Hitachi, Ltd.
- Ayumu Morita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum switchgear
- Patent number 7,902,479
- Issue date Mar 8, 2011
- Hitachi, Ltd.
- Kenji Tsuchiya
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum switchgear
- Patent number 7,244,903
- Issue date Jul 17, 2007
- Hitachi, Ltd.
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas-insulated switchgear tank
- Patent number 7,193,172
- Issue date Mar 20, 2007
- Hitachi, Ltd.
- Toshiaki Rokunohe
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas insulating apparatus and method for locating fault point thereof
- Patent number 7,064,267
- Issue date Jun 20, 2006
- Hitachi, Ltd.
- Tatsuro Kato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas insulating apparatus and method for locating fault point thereof
- Patent number 7,027,280
- Issue date Apr 11, 2006
- Hitachi, Ltd.
- Tatsuro Kato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Vacuum switchgear
- Patent number 6,884,940
- Issue date Apr 26, 2005
- Hitachi, Ltd.
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas insulating apparatus and method for locating fault point thereof
- Patent number 6,853,528
- Issue date Feb 8, 2005
- Hitachi, Ltd.
- Tatsuro Kato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas insulated device and failure rating method
- Patent number 6,850,399
- Issue date Feb 1, 2005
- Hitachi, Ltd.
- Tatsuro Kato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas insulated electric apparatus
- Patent number 6,063,997
- Issue date May 16, 2000
- Hitachi, Ltd.
- Fumihiro Endo
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas insulated switchgear
- Patent number 6,002,085
- Issue date Dec 14, 1999
- Hitachi, Ltd.
- Tomoaki Utsumi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Gas circuit breaker
- Patent number 5,837,955
- Issue date Nov 17, 1998
- Hitachi, Ltd.
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Insulation gas filled circuit breaker
- Patent number 5,728,989
- Issue date Mar 17, 1998
- Hitachi, Ltd.
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Power apparatus and method of location of a fault in a power appara...
- Patent number 5,256,976
- Issue date Oct 26, 1993
- Hitachi, Ltd.
- Toshio Ishikawa
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Switching Unit or Switching Gear
- Publication number 20150102013
- Publication date Apr 16, 2015
- Hitachi, Ltd
- Miki Yamazaki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Switch Unit and Switchgear
- Publication number 20120175234
- Publication date Jul 12, 2012
- Hitachi, Ltd
- Daisuke SUGAI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SWITCH UNIT AND SWITCHGEAR EQUIPPED THEREWITH
- Publication number 20120132622
- Publication date May 31, 2012
- Hitachi, Ltd.
- Miki YAMAZAKI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Switchgear and Method for Operating Switchgear
- Publication number 20110036811
- Publication date Feb 17, 2011
- Hitachi, Ltd
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
VACUUM SWITCHGEAR
- Publication number 20100122967
- Publication date May 20, 2010
- Hitachi, Ltd
- Ayumu MORITA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
VACUUM SWITCHGEAR
- Publication number 20070228014
- Publication date Oct 4, 2007
- Kenji TSUCHIYA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Gas-insulated switchgear tank
- Publication number 20060186091
- Publication date Aug 24, 2006
- Hitachi Ltd.
- Toshiaki Rokunohe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Vacuum switchgear
- Publication number 20050173143
- Publication date Aug 11, 2005
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Gas insulating apparatus and method for locating fault point thereof
- Publication number 20050135029
- Publication date Jun 23, 2005
- Tatsuro Kato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Gas insulating apparatus and method for locating fault point thereof
- Publication number 20050135028
- Publication date Jun 23, 2005
- Hitachi, Ltd.
- Tatsuro Kato
- G01 - MEASURING TESTING
Information Patent Application
VACUUM SWITCHGEAR
- Publication number 20050103514
- Publication date May 19, 2005
- Tomoaki Utsumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Gas-insulated switchgear tank
- Publication number 20050056617
- Publication date Mar 17, 2005
- Toshiaki Rokunohe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Gas insulating apparatus and method for locating fault point thereof
- Publication number 20030112569
- Publication date Jun 19, 2003
- Hitachi, Ltd.
- Tatsuro Kato
- H01 - BASIC ELECTRIC ELEMENTS

Tomoaki Utsumi

Person

Patents Grantslast 30 patents

Switching unit or switching gear

Switch unit and switchgear

Switch unit and switchgear equipped therewith

Switchgear and method for operating switchgear

Vacuum switchgear

Vacuum switchgear

Vacuum switchgear

Gas-insulated switchgear tank

Gas insulating apparatus and method for locating fault point thereof

Gas insulating apparatus and method for locating fault point thereof

Vacuum switchgear

Gas insulating apparatus and method for locating fault point thereof

Gas insulated device and failure rating method

Gas insulated electric apparatus

Gas insulated switchgear

Gas circuit breaker

Insulation gas filled circuit breaker

Power apparatus and method of location of a fault in a power appara...

Patents Applicationslast 30 patents

Switching Unit or Switching Gear

Switch Unit and Switchgear

SWITCH UNIT AND SWITCHGEAR EQUIPPED THEREWITH

Switchgear and Method for Operating Switchgear

VACUUM SWITCHGEAR

VACUUM SWITCHGEAR

Gas-insulated switchgear tank

Vacuum switchgear

Gas insulating apparatus and method for locating fault point thereof

Gas insulating apparatus and method for locating fault point thereof

VACUUM SWITCHGEAR

Gas-insulated switchgear tank

Gas insulating apparatus and method for locating fault point thereof