Patent classifications
E
FIXED CONSTRUCTIONS
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E03
WATER SUPPLY; SEWERAGE
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E03D
WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
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2201/00
Details and methods of use for water closets and urinals not otherwise provided for
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E03D2201/30
Water injection in siphon for enhancing flushing
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