Yukio Kurosawa

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Power use circuit breaker and electrical circuit arrangement for el...
- Patent number 6,838,631
- Issue date Jan 4, 2005
- Hitachi, Ltd.
- Noriaki Munakata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Power use circuit breaker and electrical circuit arrangement for el...
- Patent number 6,751,078
- Issue date Jun 15, 2004
- Hitachi, Ltd.
- Noriaki Munakata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker as well as vacuum valve and electric contact...
- Patent number 6,048,216
- Issue date Apr 11, 2000
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Vacuum circuit breaker as well as vacuum valve and electric contact...
- Patent number 5,852,266
- Issue date Dec 22, 1998
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Puffer type gas circuit breaker
- Patent number 5,814,781
- Issue date Sep 29, 1998
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer type gas breaker
- Patent number 5,793,597
- Issue date Aug 11, 1998
- Hitachi, Ltd.
- Eisaku Mizufune
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method forming an electric contact in a vacuum circuit breaker
- Patent number 5,697,150
- Issue date Dec 16, 1997
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Vacuum circuit breaker with improved contact assembly
- Patent number 5,691,521
- Issue date Nov 25, 1997
- Hitachi, Ltd.
- Katsuhiro Komuro
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Compression gas puffer type circuit breaker
- Patent number 5,610,381
- Issue date Mar 11, 1997
- Hitachi, Ltd.
- Eisaku Mizufune
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Apparatus for controlling opening and closing timings of a switchin...
- Patent number 5,563,459
- Issue date Oct 8, 1996
- Hitachi, Ltd.
- Yukio Kurosawa
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Vacuum circuit breaker and electric contact
- Patent number 5,557,083
- Issue date Sep 17, 1996
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Switch mechanism
- Patent number 5,502,290
- Issue date Mar 26, 1996
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrical power supply system
- Patent number 5,473,494
- Issue date Dec 5, 1995
- Hitachi, Ltd.
- Yukio Kurosawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Solid-state switch
- Patent number 5,467,049
- Issue date Nov 14, 1995
- Hitachi, Ltd.
- Junzo Kida
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Gas isolated disconnecting switch and gas isolated switching device
- Patent number 5,410,116
- Issue date Apr 25, 1995
- Hitachi, Ltd.
- Jun Ozawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Circuit breaker with parallel resistor
- Patent number 5,391,930
- Issue date Feb 21, 1995
- Hitachi, Ltd.
- Youichi Ohshita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker
- Patent number 5,379,014
- Issue date Jan 3, 1995
- Hitachi, Ltd.
- Takashi Sato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of and device for protecting electrical power system
- Patent number 5,305,174
- Issue date Apr 19, 1994
- Hitachi, Ltd.
- Masao Morita
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Gas blast, puffer type circuit breaker with improved nozzle
- Patent number 5,274,205
- Issue date Dec 28, 1993
- Hitachi, Ltd.
- Masanori Tsukushi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer-type gas circuit breaker
- Patent number 5,229,561
- Issue date Jul 20, 1993
- Hitachi, Ltd.
- Yasuharu Seki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Contact structure for vacuum circuit breaker
- Patent number 5,189,270
- Issue date Feb 23, 1993
- Hitachi, Ltd.
- Morihisa Matumoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer type gas circuit interrupter
- Patent number 5,155,312
- Issue date Oct 13, 1992
- Hitachi, Ltd.
- Akira Hashimoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Synthetic equivalent test circuit of circuit breaker
- Patent number 5,153,518
- Issue date Oct 6, 1992
- Hitachi, Ltd.
- Minori Satoh
- G01 - MEASURING TESTING
Information Patent Grant
Plasma generating apparatus
- Patent number 5,133,825
- Issue date Jul 28, 1992
- Hi Tachi, Ltd.
- Yoshimi Hakamata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Puffer type gas circuit breaker, contact cover and insulated nozzle...
- Patent number 5,079,391
- Issue date Jan 7, 1992
- Hitachi, Ltd.
- Osamu Koyanagi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gas circuit breaker
- Patent number 5,079,392
- Issue date Jan 7, 1992
- Hitachi, Ltd.
- Masanori Tsukushi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Circuit breaker
- Patent number 5,039,831
- Issue date Aug 13, 1991
- Hitachi, Ltd.
- Minori Sato
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Vacuum switch apparatus
- Patent number 5,038,082
- Issue date Aug 6, 1991
- Hitachi, Ltd.
- Hiroshi Arita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Three-phase common container-type circuit breaker
- Patent number 5,012,051
- Issue date Apr 30, 1991
- Hitachi, Ltd.
- Masanori Tsukushi
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Contact abnormality detecting system
- Patent number 4,975,800
- Issue date Dec 4, 1990
- Hitachi, Ltd.
- Youichi Oshita
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Power use circuit breaker and electrical circuit arrangement for el...
- Publication number 20040074875
- Publication date Apr 22, 2004
- Hitachi, Ltd.
- Noriaki Munakata
- H01 - BASIC ELECTRIC ELEMENTS

Yukio Kurosawa

Person

Patents Grantslast 30 patents

Power use circuit breaker and electrical circuit arrangement for el...

Power use circuit breaker and electrical circuit arrangement for el...

Vacuum circuit breaker as well as vacuum valve and electric contact...

Vacuum circuit breaker as well as vacuum valve and electric contact...

Puffer type gas circuit breaker

Puffer type gas breaker

Method forming an electric contact in a vacuum circuit breaker

Vacuum circuit breaker with improved contact assembly

Compression gas puffer type circuit breaker

Apparatus for controlling opening and closing timings of a switchin...

Vacuum circuit breaker and electric contact

Switch mechanism

Electrical power supply system

Solid-state switch

Gas isolated disconnecting switch and gas isolated switching device

Circuit breaker with parallel resistor

Vacuum circuit breaker

Method of and device for protecting electrical power system

Gas blast, puffer type circuit breaker with improved nozzle

Puffer-type gas circuit breaker

Contact structure for vacuum circuit breaker

Puffer type gas circuit interrupter

Synthetic equivalent test circuit of circuit breaker

Plasma generating apparatus

Puffer type gas circuit breaker, contact cover and insulated nozzle...

Gas circuit breaker

Circuit breaker

Vacuum switch apparatus

Three-phase common container-type circuit breaker

Contact abnormality detecting system

Patents Applicationslast 30 patents

Power use circuit breaker and electrical circuit arrangement for el...