Inventor

SETO YOSHITO

3 patents

Patents

3 patents

US4247223AJan 27, 1981

Rock bolt

KUBOTA LTD21 citations74

US3979108ASep 7, 1976

Method and apparatus for removing slag

KUBOTA LTD15 citations71

US4095433AJun 20, 1978

Tunnel support structure using built-up pipe support set, and unit pipe support member therefor

KUBOTA LTD14 citations68