Patent classifications
E
FIXED CONSTRUCTIONS
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E03
WATER SUPPLY; SEWERAGE
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E03B
INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
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3/00
Methods or installations for obtaining or collecting drinking water or tap water
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E03B3/32
with artificial enrichment, e.g. by adding water from a pond or a river
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E03B3/34
of underground water
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