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Under-Drilling Bit.

Description: Patent for improvements in the design of under drilling bits in order to "reduce labor, time and expense of drilling" and "to permit the drilling of a more perfect hole" (lines 25-27), including illustrations and a description of the design.
Date: July 15, 1913
Creator: English, Harry White
Partner: UNT Libraries Government Documents Department

Gripping Device for Well-Boring Apparatus

Description: Patent for a gripping device for well-boring apparatus that allows the rotary gripping rings to be reversed and used as new when one side has been worn down completely including illustrations and instructions.
Date: June 15, 1915
Creator: Myers, George S.
Partner: UNT Libraries Government Documents Department

Stove.

Description: Patent for a heating stove that will ensure the combustion of artificial or natural gas, including instructions and illustrations.
Date: September 15, 1914
Creator: Ziegler, John C.
Partner: UNT Libraries Government Documents Department
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