US Patent 7502239 Charge pump circuit and power supply circuit
Patent 7502239 was granted and assigned to RICOH COMPANY,LTD. on March, 2009 by the United States Patent and Trademark Office.
Is a
Date Filed
May 8, 2007
0
Date of Patent
March 10, 2009
0
Patent Application Number
11797894
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Patent Citations Received
Patent Inventor Names
Kohzoh Itoh
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Patent Jurisdiction
Patent Number
Patent Primary Examiner
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