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in subjects: "plows"  
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Plow.

Description: Patent for a new and improved plow. This design consists, "with the standard and blade, of the removable L-shaped landside bar or plate, having one part or arm secured by a bolt or otherwise between the upper part of the blade and standard and the other part or arm standing at about right angles backward to resist the mold-board thrust as a landside" (lines 5-12).
Date: March 4, 1890
Creator: Stewart, John A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Disk Plow.

Description: Patent for a disk plow modification, which allows the disk to be self-sharpening and automatically release accumulated garbage.
Date: November 4, 1919
Creator: Hoffman, George L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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