HO

Hidekazu Oka

KC Kobelco Construction Machinery Co.: 18 patents #12 of 422Top 3%
Sharp Kabushiki Kaisha: 1 patents #6,861 of 10,731Top 65%
Overall (All Time): #238,001 of 4,157,543Top 6%
19
Patents All Time

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDate
10280589 Hydraulic drive apparatus for construction machine 2019-05-07
9394666 Construction machine with working attachment 2016-07-19
8441471 Light source device and display device including the same 2013-05-14
8336305 Hydraulic drive device and working machine with the same Yuuji Matsuura, Naoki Sugano, Takao Nanjo, Hiroshi Togo 2012-12-25
7878770 Hydraulic circuit of construction machine 2011-02-01
7610755 Hydraulic control apparatus of working machine Etsujiro Imanishi, Naoki Sugano, Takao Nanjo 2009-11-03
7594395 Hydraulic control device for working machine Yutaka Toji 2009-09-29
7513109 Hydraulic controller for working machine Yutaka Toji, Yoichiro Yamazaki, Koji Yamashita, Koji Ueda 2009-04-07
7499783 Hydraulic control apparatus for hydraulic excavator 2009-03-03
7284371 Hydraulic control system for working machine Yutaka Toji, Yoichiro Yamazaki 2007-10-23
7178333 Hydraulic control system for hydraulic excavator 2007-02-20
7174711 Hydraulic control system and construction machine Takao Nanjo, Naoki Sugano, Etsujiro Imanishi, Yutaka Toji 2007-02-13
7168246 Hydraulic control device for working machine Yutaka Toji 2007-01-30
7131453 Hydraulic valve device and method for assembling the same Yutaka Toji 2006-11-07
7059125 Hydraulic controller for construction machine Koji Yamashita, Saburo Senoo 2006-06-13
6837140 Control system and method for hydraulic working machine Kazuhiko Fujii, Naoki Sugano, Etsujiro Imanishi 2005-01-04
6708490 Hydraulic system for construction machine Yutaka Toji 2004-03-23
6688102 Traveling control device 2004-02-10
6655135 Construction machine 2003-12-02