Inventor
HAKAMATA YOSHIMI
JP18 patents
Patents
18 patentsUS6248969B1Jun 19, 2001
Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode used therefor
HITACHI LTD24 citations92
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
US5612523AMar 18, 1997
Vacuum circuit-breaker and electrode assembly therefor and a manufacturing method thereof
HITACHI LTD30 citations92
US5594224AJan 14, 1997
Vacuum circuit interrupter
HITACHI LTD20 citations92
US5557083ASep 17, 1996
Vacuum circuit breaker and electric contact
HITACHI LTD22 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
US6437275B1Aug 20, 2002
Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof
HITACHI LTD27 citations91
US6144005ANov 7, 2000
Vacuum switch and a vacuum switchgear using the same
HITACHI LTD30 citations91
US4851668AJul 25, 1989
Ion source application device
HITACHI LTD27 citations90
US5763848AJun 9, 1998
Electrode for vacuum circuit breaker
HITACHI LTD16 citations73
US5697150ADec 16, 1997
Method forming an electric contact in a vacuum circuit breaker
HITACHI LTD17 citations73
US5349196ASep 20, 1994
Ion implanting apparatus
HITACHI LTD9 citations73
US6259051B1Jul 10, 2001
Vacuum switch and a vacuum switchgear using the same
HITACHI LTD9 citations72
US5691521ANov 25, 1997
Vacuum circuit breaker with improved contact assembly
HITACHI LTD16 citations72
US4847476AJul 11, 1989
Ion source device
HITACHI LTD17 citations71