Inventor
YAMAKOSHI TAKATO
JP2 patents
Patents
2 patentsUS4649751AMar 17, 1987
Supervisory operation control system for protecting elevators or the like from a dangerous situation
HITACHI ELEVATOR ENG & SERVICE11 citations68
US4916368AApr 10, 1990
Controlling method and device for permanent magnet synchronous motor
HITACHI ELEVATOR ENG & SERVICE19 citations67