Inventor

TOMIO YUSAKU

JP20 patents

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

TOMIO YUSAKU

NIPPON STEEL CORP

Martensitic stainless steel material and method for producing martensitic stainless steel material

Martensitic stainless steel material

Austenitic alloy pipe and method for producing same

Martensitic stainless seamless steel pipe

Seamless steel pipe suitable for use in sour environment

Martensitic stainless steel material

Seamless steel pipe and method for producing the same

Alloy material and oil-well seamless pipe

Cr-Ni alloy and seamless steel pipe made of Cr-Ni alloy

Martensitic stainless seamless steel pipe

Duplex stainless seamless steel pipe and method for producing duplex stainless seamless steel pipe

NIPPON STEEL & SUMITOMO METAL CORP

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

Martensitic Cr-containing steel and oil country tubular goods

High-strength austenitic stainless steel for high-pressure hydrogen gas

High-strength steel material for oil well and oil well pipes

High-strength steel material for oil well and oil country tubular goods

Ni—Cr alloy material and seamless oil country tubular goods using the same

Stainless steel and stainless steel product for oil well

OMURA TOMOHIKO

High-strength austenitic stainless steel for high-pressure hydrogen gas

HIRATA HIROYUKI

Austenitic steel welded joint