US Patent 7227837 Fault tolerant virtual tandem switch
Patent 7227837 was granted and assigned to AT&T Labs on June, 2007 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
March 23, 2000
Date of Patent
June 5, 2007
Patent Application Number
09534308
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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