Inventor
EGAWA EIJI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “EGAWA EIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI CONSTRUCTION MACHINERY
5 patentsUS5968104AOct 19, 1999
Front control system for construction machine
HITACHI CONSTRUCTION MACHINERY76 citations96
US5957989ASep 28, 1999
Interference preventing system for construction machine
HITACHI CONSTRUCTION MACHINERY53 citations92
US5752333AMay 19, 1998
Area limiting excavation control system for construction machines
HITACHI CONSTRUCTION MACHINERY48 citations92
US7712565B2May 11, 2010
HST travel system for working machine
HITACHI CONSTRUCTION MACHINERY11 citations83
US6079131AJun 27, 2000
Operation control device for three-joint type excavator
HITACHI CONSTRUCTION MACHINERY12 citations71
HITACHI CONSTRUCTION MACH CO
4 patentsUS9469969B2Oct 18, 2016
Device and method for calculating basic information for area limiting excavation control, and construction machinery
HITACHI CONSTRUCTION MACH CO8 citations82
US12450528B2Oct 21, 2025
Work management system
HITACHI CONSTRUCTION MACH CO0 citations51
US11748826B2Sep 5, 2023
Construction site management device and construction site management system
HITACHI CONSTRUCTION MACH CO0 citations51
US12141723B2Nov 12, 2024
Site management system
HITACHI CONSTRUCTION MACH CO0 citations50