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Pipe-Perforator

Description: Patent for pipe-perforator made for well screens. This perforator is designed to provide staggered rows of perforations.
Date: November 29, 1921
Creator: Dunsworth, George W.
Partner: UNT Libraries Government Documents Department

Wall-Block.

Description: Patent for an improved wall block that is designed in a T-shape so that the pieces will interlock providing stability and preventing cracks in a foundation.
Date: November 29, 1921
Creator: Hull, John W.
Partner: UNT Libraries Government Documents Department

Burglar-Alarm.

Description: Patent for a burglar alarm, designed to be simply constructed and installed.
Date: November 29, 1921
Creator: Stephens, William B.
Partner: UNT Libraries Government Documents Department

Casing-Pulling Apparatus.

Description: Patent for an apparatus to more easily and more economically remove well-casings from the ground when an oil well is no longer in use.
Date: November 29, 1921
Creator: Wilson, John Hart
Partner: UNT Libraries Government Documents Department

Cycle-Car

Description: Patent for a cycle car that can be steered and propelled by hands only and can be used with ordinary bicycles.
Date: November 29, 1921
Creator: Payne, Luther M.; Miller, Lee A. & Douglas, John J.
Partner: UNT Libraries Government Documents Department

Well Boring Apparatus.

Description: Patent for a well-boring apparatus, an invention of a drilling apparatus using a form of power to transmit rotary movement to the string of a pipe. This invention is designed to lock the rotary elements against movement when the drill or pipe is moved or adjusted within its support.
Date: November 29, 1921
Creator: Boykin, Burwell, Jr.
Partner: UNT Libraries Government Documents Department

Pneumatic Tire

Description: Patent for pneumatic tire (for use on motor vehicle wheels) with application to inner tubes that are employed within the outer casing of tire. Tire provides self-sealing inner tube for piercings or punctures.
Date: November 29, 1921
Creator: Allyn, Harley H.
Partner: UNT Libraries Government Documents Department

Method of Sealing the Walls of Deep Wells

Description: Patent for a new and useful method of dealing the walls of deep wells in which the means for lining oil wells by the use of the customary metal casing is avoided, the cost is very materially reduced, and numerous expenses and failures are avoided.
Date: November 29, 1921
Creator: Nolan, William E.
Partner: UNT Libraries Government Documents Department
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