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Train-Pipe Coupling.

Description: Patent for a train pipe coupling that holds tightly together.
Date: March 28, 1911
Creator: Moss, Dexter W. & Olschner, Clarence E.
Partner: UNT Libraries Government Documents Department

Process of Making Aluminum Chlorid.

Description: Patent for the process of making aluminum chlorid (chloride) wherein solid materials are preheated to alleviate heating supply issues during the process.
Date: May 28, 1918
Creator: King, George H. & Roberts, Gerald I.
Partner: UNT Libraries Government Documents Department

Change-Speed Mechanism for Tractor-Truck Motor-Vehicles

Description: Patent for a machine that can be used either as a truck for traveling over highways or as a tractor for farm work.
Date: October 28, 1919
Creator: Miller, William J.
Partner: UNT Libraries Government Documents Department
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