Blade for an earth working tool

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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D0474659

CLAIM:
The ornamental design for a blade for an earth working tool, as shown and described.

REFERENCES:
patent: 32982 (1861-08-01), Crapo
patent: 387806 (1888-08-01), Parker
patent: 499251 (1893-06-01), Rockey
patent: 2280778 (1942-04-01), Anderson
patent: D297801 (1988-09-01), Olsson
patent: D317854 (1991-07-01), Pifalo
patent: D384867 (1997-10-01), Willis
patent: D390762 (1998-02-01), Douglas

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