Inventor
YORIFUJI AKIRA
JP20 patents
⚠️ This page may combine multiple inventors who share the name “YORIFUJI AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KAWASAKI STEEL CO
12 patentsUS6331216B1Dec 18, 2001
Steel pipe having high ductility and high strength and process for production thereof
KAWASAKI STEEL CO41 citations92
US6290789B1Sep 18, 2001
Ultrafine-grain steel pipe and process for manufacturing the same
KAWASAKI STEEL CO26 citations92
US6006789ADec 28, 1999
Method of preparing a steel pipe, an apparatus thereof and a steel pipe
KAWASAKI STEEL CO32 citations92
US6216511B1Apr 17, 2001
Apparatus and method for smoothing a welded seam of steel pipe
KAWASAKI STEEL CO16 citations91
US5942132AAug 24, 1999
Method of and apparatus for producing steel pipes
KAWASAKI STEEL CO23 citations91
US5983689ANov 16, 1999
Lubricant for use in hot work
KAWASAKI STEEL CO18 citations90
US5859124AJan 12, 1999
Lubricant for use in hot work
KAWASAKI STEEL CO22 citations90
US6202463B1Mar 20, 2001
Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe
KAWASAKI STEEL CO17 citations83
US6375059B2Apr 23, 2002
Method for smoothing steel pipe seam portion
KAWASAKI STEEL CO6 citations72
US5813962ASep 29, 1998
Forged roll for rolling a seamless steel pipe
KAWASAKI STEEL CO11 citations70
US6216520B1Apr 17, 2001
Rolling mill
KAWASAKI STEEL CO3 citations60
US5950310ASep 14, 1999
Forged roll for rolling a seamless steel pipe and manufacturing method of same
KAWASAKI STEEL CO1 citations48
JFE STEEL CORP
7 patentsUS6749954B2Jun 15, 2004
Welded steel pipe having excellent hydroformability and method for making the same
JFE STEEL CORP25 citations92
US7018488B2Mar 28, 2006
Steel pipe for use in reinforcement of automobile and method for production thereof
JFE STEEL CORP8 citations73
US6755919B2Jun 29, 2004
Stainless steel tube for automobile structure
JFE STEEL CORP8 citations72
US6736910B2May 18, 2004
High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same
JFE STEEL CORP7 citations71
US6723453B2Apr 20, 2004
Welded steel pipe having excellent hydroformability and method for making the same
JFE STEEL CORP2 citations62
US6682829B2Jan 27, 2004
Welded steel pipe having excellent hydroformability and method for making the same
JFE STEEL CORP1 citations52
US7591914B2Sep 22, 2009
High-workability steel pipe and method of producing same
JFE STEEL CORP0 citations51