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ISOLATION OF SUBTERRANEAN ZONES

10/619,285 | U.S. Patent Application

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Location ELECTRONIC
Filed July 14, 2003
Examiner FRANK TSAY
Class 166
Art Group 3672
Patent No. 7,121,352
Case Type Utility - 166/387000
Status Patented Case
Parent 09/969,922 Patented
Parent 09/440,338 Patented
Parent 60/108,558 Expired
Last Updated: 6 years, 8 months ago
Date # Transaction