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in creator/contributor: "Spellman, John M."  
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Improvement to Elevator Signal Systems

Description: Patent for an improvement to an elevator in which “to provide an elevator signal system that will permit a party at any landing to indicate his desire to go up or down to the elevator operator by pressing one of two buttons” (lines 10-15). Instructions and illustration included.
Date: February 2, 1915
Creator: Johnson, Charles S.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Improvement for Cotton Chopper

Description: Patent for improvement for cotton choppers “so that the operator may regulate the depth of cut, and may shift the cutting member forward or back” (lines 18-20). Instructions and illustration included.
Date: February 2, 1915
Creator: Finch, Arthur M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Motor Car Wheel

Description: Patent for a more durable and reliable wheel for automobiles, including instructions and illustrations.
Date: February 21, 1907
Creator: Lane, Luther L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Combined Cotton Chopper and Cultivator.

Description: Patent for improved combined cotton choppers and cultivators where the operation of the chopper blades can be instantly controlled from the seat. This is combined with the cultivator shovels carried on the machine to the rear of the revolving chopper blades that are used to cultivate the soil.
Date: February 21, 1922
Creator: Whitaker, George
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Apparatus for Cleaning Cotton

Description: Patent for an improvement to boll breakers and cotton cleaners by performing the tasks of picking, cleaning, beating, and spreading more efficiently and effectively.
Date: February 19, 1918
Creator: Streun, John Arnold
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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