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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US413799830 Aug 19776 Feb 1979Oil change nozzle
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US711168220 Jul 200426 Sep 2006Mark Kevin BlaisdellMethod and apparatus for gas displacement well systems
US736059722 Sep 200622 Apr 2008Mark Kevin BlaisdellMethod and apparatus for gas displacement well systems