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Hopple.

Description: Patent for a hopple, which keeps the beams of a cultivator in place.
Date: August 11, 1908
Creator: Gilbert, Edward Leslie
Partner: UNT Libraries Government Documents Department

Drag

Description: Patent for a ground drag for "grading and removing refuse from the surface of the soil" (lines 10-12) that can be steered and that can gather and dispose of the dirt it levels off, including illustrations.
Date: May 11, 1920
Creator: Nelson, Charley E.
Partner: UNT Libraries Government Documents Department
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