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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3/00
Flushing devices operated by pressure of the water supply system; flushing valves not connected to the water-supply main, also if air is blown in the water seal for a quick flushing
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E03D3/02
Self-closing flushing valves
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