US Patent D639902 Sealing structure for blocking an opening

Patent D639902 was granted and assigned to Caldwell Tanks, Inc. on June, 2011 by the United States Patent and Trademark Office.

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Patent Inventor Names

Mark Ammons0

Donald W. Shepherd0

Date of Patent

June 14, 2011

Patent Application Number

29362442

Date Filed

May 25, 2010

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