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Harrow

Description: Patent for improvement for harrows, "which may be adjusted so as to spread them apart or bring the same close together." (lines 15-17) The adjustable frame of the harrow allows the device to be used for different purposes of cultivation.
Date: February 20, 1912
Creator: Robbins, John F.
Partner: UNT Libraries Government Documents Department

Swingletree

Description: Patent for a swingletree that equalizes the strain of the draft animal when the traces are connected in an irregular manner.
Date: July 20, 1920
Creator: Bosse, William F.
Partner: UNT Libraries Government Documents Department
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