Inventor
EZUMI MASAKUNI
JP62 patents
⚠️ This page may combine multiple inventors who share the name “EZUMI MASAKUNI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
49 patentsUS7036707B2May 2, 2006
Friction stir welding method, frame members used therein, and product formed thereby
HITACHI LTD76 citations99
US6193137B1Feb 27, 2001
Constructive body and friction stir welding method
HITACHI LTD145 citations99
US6536651B2Mar 25, 2003
Friction stir welding method
HITACHI LTD104 citations98
US6299050B1Oct 9, 2001
Friction stir welding apparatus and method
HITACHI LTD127 citations98
US6305866B1Oct 23, 2001
Structure joined by friction stir welding
HITACHI LTD60 citations97
US6237829B1May 29, 2001
Friction stir welding apparatus
HITACHI LTD59 citations97
US6050474AApr 18, 2000
Friction stir welding method, frame members used therein, and product formed thereby
HITACHI LTD222 citations97
US6619534B2Sep 16, 2003
Friction stir welding method using members which overlap and have protrusion at the weld location prior to the welding
HITACHI LTD22 citations96
US6585443B2Jul 1, 2003
Structural body formed by friction stir welding two members, one of which has a protruding portion
HITACHI LTD22 citations96
US6471112B2Oct 29, 2002
Friction stir welding method
HITACHI LTD36 citations96
US6419144B2Jul 16, 2002
Method of forming structural body using friction stir welding, and structural body formed
HITACHI LTD32 citations96
US6382498B2May 7, 2002
Friction stir welding method including positioning of rotary tool, and structural body formed thereby
HITACHI LTD37 citations96
US6378754B2Apr 30, 2002
Friction stir welding method including removal of protruding portion, and structural body formed thereby
HITACHI LTD32 citations96
US6315187B1Nov 13, 2001
Friction stir welding method
HITACHI LTD51 citations96
US6311889B1Nov 6, 2001
Manufacturing method of a structure body and a manufacturing apparatus of a structure body
HITACHI LTD61 citations96
US6290117B1Sep 18, 2001
Friction stir welding method and friction stir welding apparatus
HITACHI LTD57 citations96
US6273323B1Aug 14, 2001
Manufacturing method of a structural body
HITACHI LTD59 citations96
US6250037B1Jun 26, 2001
Structure body and hollow shape extruded frame member
HITACHI LTD77 citations96
US6527470B2Mar 4, 2003
Structural body and friction stir welding method
HITACHI LTD29 citations93
US6936332B2Aug 30, 2005
Extruded frame member for use in friction stir welding
HITACHI LTD17 citations92
US6777107B2Aug 17, 2004
Structural body formed by friction stir welding
HITACHI LTD13 citations92
US6745929B1Jun 8, 2004
Method of manufacturing structural body and structural body
HITACHI LTD23 citations92
US6733900B2May 11, 2004
Car body formed by friction stir welding
HITACHI LTD15 citations92
US6691484B2Feb 17, 2004
Hollow extruded frame member for friction stir welding and structure body formed therefrom
HITACHI LTD16 citations92
US6607837B2Aug 19, 2003
Structural body formed by friction stir welding method
HITACHI LTD15 citations92
US6595403B2Jul 22, 2003
Friction stir welding method
HITACHI LTD27 citations92
US6532712B2Mar 18, 2003
Structural body and method of manufacture thereof
HITACHI LTD19 citations92
US6530513B2Mar 11, 2003
Friction stir welding method, and method for manufacturing car body
HITACHI LTD23 citations92
US6513698B2Feb 4, 2003
Method of manufacture of a structural body
HITACHI LTD16 citations92
US6502739B2Jan 7, 2003
Method of manufacture of a structural body
HITACHI LTD18 citations92
US6494011B2Dec 17, 2002
Hollow extruded frame member for friction stir welding
HITACHI LTD33 citations92
US6474533B1Nov 5, 2002
Friction stir welding method
HITACHI LTD35 citations92
US6422449B1Jul 23, 2002
Method of mending a friction stir welding portion
HITACHI LTD46 citations92
US6378264B1Apr 30, 2002
Structure body and method of manufacture thereof
HITACHI LTD42 citations92
US6354483B1Mar 12, 2002
Friction stir welding method
HITACHI LTD31 citations92
US6325274B2Dec 4, 2001
Method of manufacture of a structural body
HITACHI LTD20 citations92
US6321975B1Nov 27, 2001
Manufacturing method of a structure body
HITACHI LTD36 citations92
US6719184B2Apr 13, 2004
Nondestructive inspection method
HITACHI LTD25 citations91
US6793117B2Sep 21, 2004
Friction stir welding method, and hollow shape member for friction stir welding
HITACHI LTD13 citations84
US6722286B2Apr 20, 2004
Structure and railway car
HITACHI LTD18 citations84
US6582831B2Jun 24, 2003
Friction stir welded body and frame member therefor
HITACHI LTD14 citations83
US6557746B2May 6, 2003
Friction stir bonding method
HITACHI LTD17 citations83
US6640515B1Nov 4, 2003
Frame member used in friction stir welding
HITACHI LTD12 citations82
US6722555B2Apr 20, 2004
Friction stir welding method
HITACHI LTD14 citations81
US6997369B2Feb 14, 2006
Friction stir welding method
HITACHI LTD11 citations79
US6984455B2Jan 10, 2006
Friction stir welding method, and method for manufacturing car body
HITACHI LTD5 citations74
US6783055B2Aug 31, 2004
Friction stir welding method and rotary tool
HITACHI LTD10 citations74
US6716538B2Apr 6, 2004
Structural body formed by friction stir welding
HITACHI LTD2 citations74
US6705508B2Mar 16, 2004
Friction stir welding method, and method for manufacturing car body
HITACHI LTD6 citations74
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