In-tank toilet bowl cleaning device

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified

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D02846934

REFERENCES:
patent: 650161 (1900-05-01), Williams
patent: 1175032 (1916-03-01), Williams
patent: 4432102 (1984-02-01), Woodruff et al.
patent: 4451941 (1984-06-01), Gray
patent: 4453278 (1984-06-01), Doggett et al.
patent: 4462121 (1984-07-01), Dirksing et al.
patent: 4507812 (1985-04-01), Dubois et al.
patent: 4513459 (1985-04-01), Doughty

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