Inventor

HAGIMOTO HAKUMI

JP3 patents

Patents

3 patents

US4607889AAug 26, 1986

Shield tunnel boring machine

DAIHO CONSTRUCTION CO LTD51 citations86

US5032039AJul 16, 1991

Underground excavator

DAIHO CONSTRUCTION CO LTD24 citations85

US4797031AJan 10, 1989

Caisson sinking method

DAIHO CONSTRUCTION CO LTD16 citations71