Birdhouse

Animal husbandry – Feeder or waterer – Bird feeder

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Patent

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D02819171

REFERENCES:
patent: 1791956 (1931-02-01), Cowles
patent: 1911702 (1933-05-01), Mallgraf
patent: 2190721 (1940-02-01), Mallgraf
patent: 2230305 (1941-02-01), Mallgraf
patent: 2292614 (1942-08-01), Copeman
patent: 2424733 (1947-07-01), Benson
patent: 2666414 (1954-01-01), Burr et al.
patent: 3198172 (1965-08-01), Crane, Jr.
patent: 3250279 (1966-05-01), Nelson et al.
patent: 3581708 (1971-06-01), Beck et al.
patent: 3945344 (1976-03-01), Melrath

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