Inventor
WATANABE ATSUMI
JP12 patents
Patents
12 patentsUS4775967AOct 4, 1988
Beam spot control device using a thin micro lens with an actuator
HITACHI LTD55 citations96
US4622922ANov 18, 1986
Combustion control method
HITACHI LTD80 citations95
US5177717AJan 5, 1993
Optical memory medium and its information recording and erasing method and apparatus
HITACHI LTD32 citations92
US4841514AJun 20, 1989
Optical recording method and apparatus using two fight spots
HITACHI LTD35 citations92
US4718053AJan 5, 1988
Optical information apparatus and method of recording and erasing information
HITACHI LTD23 citations81
US4210956AJul 1, 1980
Method and system of controlling high voltage direct current power transmission plants
HITACHI LTD22 citations81
US4764913AAug 16, 1988
Signal processing apparatus for disc memory devices
HITACHI LTD17 citations73
US4028607AJun 7, 1977
Inverter control system
HITACHI LTD16 citations73
US4620491ANov 4, 1986
Method and apparatus for supervising combustion state
HITACHI LTD18 citations72
US4223236ASep 16, 1980
Gate controlling apparatus for a thyristor valve
HITACHI LTD7 citations72
US4100434AJul 11, 1978
Gate controlling apparatus for a thyristor valve
HITACHI LTD14 citations72
US4562507ADec 31, 1985
Protective relay
HITACHI LTD3 citations62