US Patent 7522837 Optical communication system
Patent 7522837 was granted and assigned to Nippon Telegraph and Telephone on April, 2009 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
November 19, 2003
Date of Patent
April 21, 2009
Patent Application Number
10717225
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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