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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23/00
Pumping installations or systems
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F04B23/021
the pump being immersed in the reservoir
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F04B23/023
only the pump-part being immersed, the driving-part being outside the reservoir
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