Inventor
OKABE NOBUYA
JP5 patents
Patents
5 patentsUS4697418AOct 6, 1987
Control system for hydraulically-operated construction machinery
HITACHI CONSTRUCTION MACHINERY53 citations92
US4726186AFeb 23, 1988
Control system of hydraulic construction machinery
HITACHI CONSTRUCTION MACHINERY39 citations91
US4528892AJul 16, 1985
Hydraulic circuit system for construction machine
HITACHI CONSTRUCTION MACHINERY31 citations91
US4561824ADec 31, 1985
Hydraulic drive system for civil engineering and construction machinery
HITACHI CONSTRUCTION MACHINERY27 citations89
US4489805ADec 25, 1984
Universal lever apparatus for hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY17 citations71