US Patent 7146836 Piercing method for manufacturing of seamless pipe
Patent 7146836 was granted and assigned to Sumitomo Metal Industries on December, 2006 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
January 13, 2006
0
Date of Patent
December 12, 2006
0
Patent Application Number
11331100
0
Patent Inventor Names
Chihiro Hayashi
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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