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in subjects: "Tillage"  
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Scarifier and Blocker.

Description: Patent for a scarifier and blocker designed specifically to go around small plants that is mounted on wheels.
Date: July 10, 1917
Creator: Weisenborn, George P. A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Revolving Harrow

Description: Patent for a wheeled revolving harrow used to pulverize the ground, reducing it to a good condition for planting grain.
Date: unknown
Creator: Thurston, Collie & Miller, Willie D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Cultivator.

Description: Patent for a riding cultivator that keeps the shovel gangs positioned "parallel with the line of the draft, or with the longitudinal axis of the machine" (lines 19-21), by shifting them in the direction that the driver guides the wheels. The cultivator also provides a means to keep the depth of cultivation as uniform as possible when working on uneven ground or in different kinds of soil.
Date: January 3, 1922
Creator: Mayer, Henry A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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