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Check valve
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Patent number 4,662,392
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Issue date May 5, 1987
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Intevep, S.A.
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Amnon F. Vadasz
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Pump
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Patent number 4,516,479
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Issue date May 14, 1985
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Intevep, S.A.
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Amnon F. Vadasz
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Check valve
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Patent number 4,513,778
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Issue date Apr 30, 1985
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Intevep, S.A.
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Amnon F. Vadasz
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...