US Patent 7190658 Optical element having a plurality of ring-shaped zones
Patent 7190658 was granted and assigned to Konica on March, 2007 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
December 18, 2002
Date of Patent
March 13, 2007
Patent Application Number
10321566
Patent Inventor Names
Kiyono Ikenaka
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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