Inventor
TATSUMI AKIRA
JP18 patents
⚠️ This page may combine multiple inventors who share the name “TATSUMI AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI CONSTRUCTION MACHINERY
11 patentsUS5155996AOct 20, 1992
Hydraulic drive system for construction machine
HITACHI CONSTRUCTION MACHINERY61 citations96
US5307631AMay 3, 1994
Hydraulic control apparatus for hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY57 citations95
US5638677AJun 17, 1997
Control device for hydraulically propelled work vehicle
HITACHI CONSTRUCTION MACHINERY75 citations94
US5479778AJan 2, 1996
Hydraulic control system for construction machines
HITACHI CONSTRUCTION MACHINERY33 citations92
US5277269AJan 11, 1994
Engine revolution speed control device for a hydraulically driven vehicle
HITACHI CONSTRUCTION MACHINERY28 citations92
US4955344ASep 11, 1990
Apparatus for controlling rotational speed of prime mover of construction machine
HITACHI CONSTRUCTION MACHINERY41 citations92
US4942737AJul 24, 1990
Drive control system for hydraulic construction machine
HITACHI CONSTRUCTION MACHINERY31 citations92
US4697418AOct 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
US5477679ADec 26, 1995
Apparatus for controlling revolution speed of prime mover for hydraulically propelled work vehicle
HITACHI CONSTRUCTION MACHINERY18 citations71
US5036817AAug 6, 1991
Engine remote control system
HITACHI CONSTRUCTION MACHINERY3 citations60