Baths – closets – sinks – and spittoons – Pool type – Construction details
Patent
1981-01-26
1983-02-15
Cohan, Alan
Baths, closets, sinks, and spittoons
Pool type
Construction details
137428, 137563, 4509, F16K 118
Patent
active
043732208
ABSTRACT:
An improved water-level control method and apparatus automatically maintains the water level in a pool by selectively filling or draining water as required during the period that the circulating system is not operating.
REFERENCES:
patent: 2739939 (1956-05-01), Leslie
patent: 4211249 (1980-07-01), Richards
Cohan Alan
Smith A. C.
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