Inventor
KUROHA HIROAKI
6 patents
Patents
6 patentsUS4263988AApr 28, 1981
Speed control system for a motor
HITACHI LTD23 citations81
US4361866ANov 30, 1982
Power converter apparatus
HITACHI LTD9 citations73
US4133018AJan 2, 1979
Thyristor fault-detecting apparatus
HITACHI LTD16 citations73
US4171505AOct 16, 1979
Fault detecting system for a control system
HITACHI LTD7 citations71
US4256204AMar 17, 1981
Safety apparatus for elevator system
HITACHI LTD8 citations70
US4584636AApr 22, 1986
AC-to-DC power converter with improved power factor and overvoltage suppression
HITACHI LTD3 citations62