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Process of Producing Tire-Patch Material.

Description: Patent for an improved tire patch material combination and production process, which results in less water absorption and better adhesion to the tire.
Date: May 11, 1920
Creator: Duffy, Clarence O.
Partner: UNT Libraries Government Documents Department

Prepay Time-Controlled-Service Apparatus.

Description: Patent for an improvement in prepay time controlled service apparatus that uses the solenoid and armature as a stopping means for the time mechanism.
Date: May 11, 1920
Creator: Thompson, William H. & Thompson, J. D.
Partner: UNT Libraries Government Documents Department

Game.

Description: Patent for a board game based on finance. The board game uses numbered discs that players own multiple quantities of that indicate their positions on the board.
Date: January 11, 1921
Creator: Sterling, Don L.
Partner: UNT Libraries Government Documents Department

Drill-Bit

Description: Patent for new improvement in drill-bits. The object of the invention is to "provide the driller with advanced knowledge of the formation into which he is about to extend his main hole".
Date: January 11, 1921
Creator: Smith, Primus W.; Bookhout, John J. & Monce, Edwin W.
Partner: UNT Libraries Government Documents Department

Building-Slab

Description: Patent for new invention that would improve in the construction of upright walls.
Date: February 11, 1920
Creator: Hanszen, Oscar A.
Partner: UNT Libraries Government Documents Department
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