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Backflow preventer
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Patent number 7,128,088
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Issue date Oct 31, 2006
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Danfoss Flomatic Corporation
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Bo Andersson
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Check valve and method of fabrication
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Patent number 6,581,633
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Issue date Jun 24, 2003
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Flomatic Corporation
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Bo Andersson
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Check valve
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Patent number 5,176,171
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Issue date Jan 5, 1993
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Flomatic Corporation
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Bo Andersson
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Stabilizing check valve
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Patent number 4,129,144
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Issue date Dec 12, 1978
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Bo Allan Andersson
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...