Inventor

NAKATSUKA SHINJIRO

JP2 patents

Patents

2 patents

US9783876B2Oct 10, 2017

Stainless steel for oil wells and stainless steel pipe for oil wells

NIPPON STEEL & SUMITOMO METAL CORP5 citations69

US9555496B2Jan 31, 2017

Process for producing welded joint using GMA welding and CO2 as a shielding gas

NIPPON STEEL & SUMITOMO METAL CORP1 citations49