Inventor
KUROSAWA YUKIO
JP49 patents
⚠️ This page may combine multiple inventors who share the name “KUROSAWA YUKIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
46 patentsUS5563459AOct 8, 1996
Apparatus for controlling opening and closing timings of a switching device in an electric power system
HITACHI LTD112 citations98
US5305174AApr 19, 1994
Method of and device for protecting electrical power system
HITACHI LTD106 citations96
US6048216AApr 11, 2000
Vacuum circuit breaker as well as vacuum valve and electric contact used in same
HITACHI LTD18 citations92
US5852266ADec 22, 1998
Vacuum circuit breaker as well as vacuum valve and electric contact used in same
HITACHI LTD32 citations92
US5557083ASep 17, 1996
Vacuum circuit breaker and electric contact
HITACHI LTD22 citations92
US5473494ADec 5, 1995
Electrical power supply system
HITACHI LTD26 citations92
US5467049ANov 14, 1995
Solid-state switch
HITACHI LTD35 citations92
US5133825AJul 28, 1992
Plasma generating apparatus
HITACHI LTD54 citations92
US4739169AApr 19, 1988
Ion source
HITACHI LTD36 citations92
US4713585ADec 15, 1987
Ion source
HITACHI LTD42 citations92
US4210790AJul 1, 1980
Vacuum-type circuit interrupter
HITACHI LTD48 citations92
US4196327AApr 1, 1980
Vacuum interrupter
HITACHI LTD30 citations92
US4163130AJul 31, 1979
Vacuum interrupter with pressure monitoring means
HITACHI LTD41 citations92
US5793597AAug 11, 1998
Puffer type gas breaker
HITACHI LTD26 citations91
US6751078B1Jun 15, 2004
Power use circuit breaker and electrical circuit arrangement for electric power generation plant
HITACHI LTD27 citations90
US4975800ADec 4, 1990
Contact abnormality detecting system
HITACHI LTD35 citations90
US4939322AJul 3, 1990
Puffer type circuit breaker
HITACHI LTD24 citations90
US4851668AJul 25, 1989
Ion source application device
HITACHI LTD27 citations90
US4704506ANov 3, 1987
Vacuum interrupter
HITACHI LTD47 citations87
US5229561AJul 20, 1993
Puffer-type gas circuit breaker
HITACHI LTD9 citations74
US4864286ASep 5, 1989
Switch operation monitoring apparatus
HITACHI LTD13 citations74
US4551596ANov 5, 1985
Surge-absorberless vacuum circuit interrupter
HITACHI LTD9 citations74
US4430536AFeb 7, 1984
Vacuum interrupter
HITACHI LTD15 citations74
US5697150ADec 16, 1997
Method forming an electric contact in a vacuum circuit breaker
HITACHI LTD17 citations73
US5079391AJan 7, 1992
Puffer type gas circuit breaker, contact cover and insulated nozzle of the breaker
HITACHI LTD8 citations73
US5038082AAug 6, 1991
Vacuum switch apparatus
HITACHI LTD10 citations73
US4695689ASep 22, 1987
Vacuum circuit breaker
HITACHI LTD16 citations73
US4546222AOct 8, 1985
Vacuum switch and method of manufacturing the same
HITACHI LTD11 citations73
US4336430AJun 22, 1982
Vacuum interrupter
HITACHI LTD12 citations73
US5691521ANov 25, 1997
Vacuum circuit breaker with improved contact assembly
HITACHI LTD16 citations72
US5379014AJan 3, 1995
Vacuum circuit breaker
HITACHI LTD17 citations72
US5039831AAug 13, 1991
Circuit breaker
HITACHI LTD16 citations72
US5012051AApr 30, 1991
Three-phase common container-type circuit breaker
HITACHI LTD8 citations72
US6838631B2Jan 4, 2005
Power use circuit breaker and electrical circuit arrangement for electric power generation plant
HITACHI LTD5 citations71
US5814781ASep 29, 1998
Puffer type gas circuit breaker
HITACHI LTD15 citations71
US5610381AMar 11, 1997
Compression gas puffer type circuit breaker
HITACHI LTD8 citations71
US5391930AFeb 21, 1995
Circuit breaker with parallel resistor
HITACHI LTD8 citations71
US5153518AOct 6, 1992
Synthetic equivalent test circuit of circuit breaker
HITACHI LTD8 citations71
US4847476AJul 11, 1989
Ion source device
HITACHI LTD17 citations71
US5079392AJan 7, 1992
Gas circuit breaker
HITACHI LTD17 citations70
US5502290AMar 26, 1996
Switch mechanism
HITACHI LTD5 citations63
US5410116AApr 25, 1995
Gas isolated disconnecting switch and gas isolated switching device
HITACHI LTD5 citations63
US4427857AJan 24, 1984
Vacuum interrupter
HITACHI LTD4 citations63
US5155312AOct 13, 1992
Puffer type gas circuit interrupter
HITACHI LTD4 citations62
US5274205ADec 28, 1993
Gas blast, puffer type circuit breaker with improved nozzle
HITACHI LTD2 citations61
US5189270AFeb 23, 1993
Contact structure for vacuum circuit breaker
HITACHI LTD4 citations60
SHINETSU CHEMICAL CO
3 patentsUS5882730AMar 16, 1999
Method for the preparation of a double-coated body of boron nitride
SHINETSU CHEMICAL CO22 citations93
US5759646AJun 2, 1998
Vessel of pyrolytic boron nitride
SHINETSU CHEMICAL CO15 citations73
US6949726B2Sep 27, 2005
Heating apparatus having electrostatic adsorption function
SHINETSU CHEMICAL CO3 citations62