US Patent 7143547 Spring assisted swing door operator
Patent 7143547 was granted and assigned to Overhead Door Corporation on December, 2006 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
December 31, 2003
Date of Patent
December 5, 2006
Patent Application Number
10749636
Patent Citations Received
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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