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David Michael Kay
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Hartlepool, GB
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last 30 patents
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Patent Grant
Gate valve
Patent number
8,672,295
Issue date
Mar 18, 2014
National-Oilwell Varco, L.P.
Samir Dhawan
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Patents Applications
last 30 patents
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Patent Application
Gate Valve
Publication number
20120085957
Publication date
Apr 12, 2012
National-Oilwell Varco, L.P.
Samir Dhawan
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Patent Application
Gate valve
Publication number
20030116742
Publication date
Jun 26, 2003
Robert William Anderson
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...