Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F04
POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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F04B
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
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43/00
Machines, pumps, or pumping installations having flexible working members
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F04B43/08
having tubular flexible members
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F04B43/084
the tubular member being deformed by stretching or distortion
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