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SUBTERRANEAN SCREEN WITH VARYING RESISTANCE TO FLOW

12/399,748 | U.S. Patent Application

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Filed March 6, 2009
Examiner RO, YONG-SUK
Class 166
Art Group 3676
Patent No. 7,954,546
Case Type Utility
Status Patented Case
Child PCTUS2010025250 RO PROCESSING COMPLETED
Last Updated: 1 week, 3 days ago
Date # Transaction