US Patent 7530248 Plug for use in piercing mill
Patent 7530248 was granted and assigned to Sumitomo Metal Industries on May, 2009 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
June 6, 2008
Date of Patent
May 12, 2009
Patent Application Number
12155657
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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