Inventor

SEO MASANAO

JP4 patents

⚠️ This page may combine multiple inventors who share the name “SEO MASANAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON STEEL & SUMITOMO METAL CORP

2 patents

US10407758B2Sep 10, 2019

Steel for oil country tubular goods and method of producing the same

NIPPON STEEL & SUMITOMO METAL CORP2 citations71

US9783876B2Oct 10, 2017

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

NIPPON STEEL & SUMITOMO METAL CORP5 citations69

SOMA ATSUSHI

1 patent

US9777352B2Oct 3, 2017

Oil-well steel pipe having excellent sulfide stress cracking resistance

SOMA ATSUSHI0 citations43

SEO MASANAO

1 patent

US9267186B2Feb 23, 2016

Method for quenching steel pipe and method for producing steel pipe using the same

SEO MASANAO0 citations27