Inventor
OKA HIDEKAZU
JP19 patents
⚠️ This page may combine multiple inventors who share the name “OKA HIDEKAZU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KOBELCO CONSTR MACHINERY LTD
15 patentsUS7178333B2Feb 20, 2007
Hydraulic control system for hydraulic excavator
KOBELCO CONSTR MACHINERY LTD31 citations92
US6708490B2Mar 23, 2004
Hydraulic system for construction machine
KOBELCO CONSTR MACHINERY LTD48 citations92
US7059125B2Jun 13, 2006
Hydraulic controller for construction machine
KOBELCO CONSTR MACHINERY LTD25 citations91
US7513109B2Apr 7, 2009
Hydraulic controller for working machine
KOBELCO CONSTR MACHINERY LTD17 citations84
US7878770B2Feb 1, 2011
Hydraulic circuit of construction machine
KOBELCO CONSTR MACHINERY LTD9 citations83
US7594395B2Sep 29, 2009
Hydraulic control device for working machine
KOBELCO CONSTR MACHINERY LTD15 citations83
US7174711B2Feb 13, 2007
Hydraulic control system and construction machine
KOBELCO CONSTR MACHINERY LTD13 citations83
US7168246B2Jan 30, 2007
Hydraulic control device for working machine
KOBELCO CONSTR MACHINERY LTD10 citations83
US6837140B2Jan 4, 2005
Control system and method for hydraulic working machine
KOBELCO CONSTR MACHINERY LTD15 citations83
US6655135B2Dec 2, 2003
Construction machine
KOBELCO CONSTR MACHINERY LTD19 citations83
US6688102B2Feb 10, 2004
Traveling control device
KOBELCO CONSTR MACHINERY LTD7 citations73
US7499783B2Mar 3, 2009
Hydraulic control apparatus for hydraulic excavator
KOBELCO CONSTR MACHINERY LTD4 citations62
US7284371B2Oct 23, 2007
Hydraulic control system for working machine
KOBELCO CONSTR MACHINERY LTD6 citations62
US7131453B2Nov 7, 2006
Hydraulic valve device and method for assembling the same
KOBELCO CONSTR MACHINERY LTD2 citations62
US7610755B2Nov 3, 2009
Hydraulic control apparatus of working machine
KOBELCO CONSTR MACHINERY LTD1 citations51