Inventor

YONESHIGE YASUO

JP3 patents

Patents

3 patents

US4944992AJul 31, 1990

Cushion

NHK SPRING CO LTD23 citations89

US4902542AFeb 20, 1990

Cushion and method of manufacturing the same

NHK SPRING CO LTD8 citations71

US5149567ASep 22, 1992

Cushion and method of manufacturing the same

NHK SPRING CO LTD2 citations60