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Helmut Flauger
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Braunfels, DE
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Vacuum pump assembly with built-in shutoff valve
Patent number
4,193,742
Issue date
Mar 18, 1980
Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
Klaus Fischer
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...