Pop-up sprinkler

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

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D02753138

REFERENCES:
patent: D226711 (1973-04-01), Kunkle, Jr.
patent: D243179 (1977-01-01), Jooste et al.
patent: D264491 (1982-05-01), Hunter
patent: 2909325 (1959-10-01), Hunter
patent: 2954171 (1960-09-01), Hruby, Jr.
patent: 2968440 (1961-01-01), Pone
patent: 2989246 (1961-06-01), Sloane
patent: 3033467 (1962-05-01), Hofer
patent: 3317144 (1967-05-01), Muschett
patent: 3408006 (1968-10-01), Stanwood
patent: 3940066 (1976-02-01), Hunter

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