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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41/00
Pumping installations or systems specially adapted for elastic fluids
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F04B41/06
Combinations of two or more pumps
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