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Shawn Moyer
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University Park, IA, US
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last 30 patents
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Patent Grant
Dual rod drill pipe with improved flow path method and apparatus
Patent number
7,694,753
Issue date
Apr 13, 2010
Vermeer Manufacturing Company
Robin Carlson
E21 - EARTH DRILLING MINING
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last 30 patents
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Patent Application
Dual rod drill pipe with improved flow path method and apparatus
Publication number
20070272444
Publication date
Nov 29, 2007
Vermeer Manufacturing Company
Robin Carlson
E21 - EARTH DRILLING MINING