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Disk Harrow.

Description: Patent for certain new and useful improvements in disk harrows.
Date: May 3, 1898
Creator: Livengood, David R.
Partner: UNT Libraries Government Documents Department

Sweep-Wing Attatchment for Plows

Description: Patent for adjustable sweep wings that attach near the shovel or blades of a plow, and which will vary the throw of the soil as it is dug by the plow.
Date: May 30, 1916
Creator: Casstephens, James A.
Partner: UNT Libraries Government Documents Department
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