Inventor

NAGAYOSHI HARUYUKI

JP3 patents

Patents

3 patents

US6027145AFeb 22, 2000

Joint for steel pipe having high galling resistance and surface treatment method thereof

NIPPON STEEL CORP164 citations95

US6705648B1Mar 16, 2004

Pipe joint

NIPPON STEEL CORP24 citations89

US4421575ADec 20, 1983

Method of cooling steel pipes

NIPPON STEEL CORP9 citations63