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Plug valve with cam actuated seal means
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Patent number 6,598,853
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Issue date Jul 29, 2003
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Alpha Thames Limited
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David Eric Appleford
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Valve actuator
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Patent number 6,572,076
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Issue date Jun 3, 2003
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Alpha Thames Ltd.
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David Eric Appleford
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Invalid bath
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Patent number 5,701,614
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Issue date Dec 30, 1997
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Alpha Thames Engineering Limited
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David E. Appleford
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Valve actuator
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Patent number 5,497,672
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Issue date Mar 12, 1996
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Alpha Thames Engineering Limited
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David E. Appleford
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E21 - EARTH DRILLING MINING
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