Inventor
TOYOOKA TAKAAKI
JP40 patents
⚠️ This page may combine multiple inventors who share the name “TOYOOKA TAKAAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KAWASAKI STEEL CO
23 patentsUS6540848B2Apr 1, 2003
High strength, high toughness, seamless steel pipe for line pipe
KAWASAKI STEEL CO19 citations92
US6331216B1Dec 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
US6095957AAug 1, 2000
Roll for hot rolling having enhanced abrasion resistance and reduced carbide segregation
KAWASAKI STEEL CO31 citations89
US5301869AApr 12, 1994
Machine for manufacturing welded steel pipes and method for handling the machine
KAWASAKI STEEL CO49 citations89
US6202463B1Mar 20, 2001
Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe
KAWASAKI STEEL CO17 citations83
US5599264AFeb 4, 1997
Roller width adjusting device for a divided type molding roller
KAWASAKI STEEL CO19 citations82
US6464802B1Oct 15, 2002
High Cr steel pipe for line pipe
KAWASAKI STEEL CO7 citations74
US4590781AMay 27, 1986
Method for forming an electric resistance welded steel pipe
KAWASAKI STEEL CO9 citations74
US6375059B2Apr 23, 2002
Method for smoothing steel pipe seam portion
KAWASAKI STEEL CO6 citations72
US5985209ANov 16, 1999
Martensitic steel for line pipe having excellent corrosion resistance and weldability
KAWASAKI STEEL CO9 citations72
US6216940B1Apr 17, 2001
Pipe forming roll apparatus and method
KAWASAKI STEEL CO10 citations71
US6041632AMar 28, 2000
Pipe forming roll apparatus and method
KAWASAKI STEEL CO9 citations71
US4568015AFeb 4, 1986
Method of forming electric welded steel tube
KAWASAKI STEEL CO10 citations71
US6136109AOct 24, 2000
Method of manufacturing high chromium martensite steel pipe having excellent pitting resistance
KAWASAKI STEEL CO4 citations61
US5858128AJan 12, 1999
High chromium martensitic steel pipe having excellent pitting resistance and method of manufacturing
KAWASAKI STEEL CO4 citations61
US6216520B1Apr 17, 2001
Rolling mill
KAWASAKI STEEL CO3 citations60
US5673579AOct 7, 1997
Welded steel pipe manufacturing apparatus and method
KAWASAKI STEEL CO5 citations60
JFE STEEL CORP
13 patentsUS6749954B2Jun 15, 2004
Welded steel pipe having excellent hydroformability and method for making the same
JFE STEEL CORP25 citations92
US7842141B2Nov 30, 2010
Stainless-steel pipe for oil well and process for producing the same
JFE STEEL CORP9 citations83
US6846371B2Jan 25, 2005
Method for making high-strength high-toughness martensitic stainless steel seamless pipe
JFE STEEL CORP7 citations74
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
US7827842B2Nov 9, 2010
Hot forging facility
JFE STEEL CORP5 citations62
US7806992B2Oct 5, 2010
Hot forged product with excellent fatigue strength, method for making the same, and machine structural part made from the same
JFE STEEL CORP4 citations62
US7678207B2Mar 16, 2010
Steel product for induction hardening, induction-hardened member using the same, and methods producing them
JFE STEEL CORP3 citations62
US6949728B2Sep 27, 2005
Impeder for manufacturing welded pipe
JFE STEEL CORP5 citations62
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