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The Apple Parer Patent Archive

The cast-iron ingenuity of the American kitchen

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Helical cam-slot

Patent drawing of a hand-held rotary coring tool with a conical cutting tip, a threaded shaft with a coiled return spring, a sliding sleeve with curved finger arms, and a thumb loop at the base, shown in side view, cross-section, and top view.

INSTRUMENT FOR REMOVING EYES FROM FRUIT OR VEGETABLES.Frederick G. Yawman · April 18, 1905

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