Inventor
NAGAO YUKIAKI
JP4 patents
Patents
4 patentsUS6408622B1Jun 25, 2002
Hydraulic drive device
HITACHI CONSTRUCTION MACHINERY45 citations91
US6584770B2Jul 1, 2003
Hydraulic drive system
HITACHI CONSTRUCTION MACHINERY17 citations83
US6526747B2Mar 4, 2003
Hydraulic driving device
HITACHI CONSTRUCTION MACHINERY20 citations82
US6397591B1Jun 4, 2002
Hydraulic driving unit
HITACHI CONSTRUCTION MACHINERY10 citations72