Soil sifter

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning

Design Patent

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Design Patent

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D0512284

CLAIM:
The ornamental design for a soil sifter, as shown and described.

REFERENCES:
patent: 842032 (1907-01-01), Smith
patent: 902954 (1908-11-01), Felty
patent: 1554525 (1925-09-01), Ricci
patent: 1646787 (1927-10-01), Elmenthaler
patent: 1820944 (1931-09-01), Marx
patent: 3188668 (1965-06-01), Buckelew
patent: 4350584 (1982-09-01), Donington
patent: 4988005 (1991-01-01), Graham
patent: D373291 (1996-09-01), Auker
patent: 5701844 (1997-12-01), Murphy

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