Patents/Inventors

Eiji Egawa

IbarakiJP2 patents

3 Patents

US124505282025
Work Management System
HITACHI CONSTRUCTION MACHINERY CO., Ltd.
0 cites
US121417232024
Site Management System
HITACHI CONSTRUCTION MACHINERY CO., Ltd.
0 cites
US117488262023
Construction Site Management Device and Construction Site Management System
HITACHI CONSTRUCTION MACHINERY CO., Ltd.
0 cites