Inventor
OBE HARUKA
JP3 patents
Patents
3 patentsUS11471923B2Oct 18, 2022
Production method of seamless steel pipe
NIPPON STEEL CORP0 citations47
US11511326B2Nov 29, 2022
Piercing machine, and method for producing seamless metal pipe using the same
NIPPON STEEL CORP0 citations42
US11344935B2May 31, 2022
Piercing machine, mandrel bar, and method for producing seamless metal pipe using the same
NIPPON STEEL CORP0 citations42