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Hydraulic Swivel

Description: Patent for a hydraulic swivel. Illustrations included.
Date: September 26, 1905
Creator: Thomson, Alexander & McLaughlin, Malacha Joseph
Partner: UNT Libraries Government Documents Department

Process For Treating Petroleum-Oils

Description: Patent for an improved process for treating petroleum oils, to remove asphaltum. (lines 9-12)
Date: December 19, 1905
Creator: Wintz, James Philip
Partner: UNT Libraries Government Documents Department

Engine Valve Mechanism

Description: Patent for an engine valve mechanism. This invention is a "class of steam engines wherein the cylinder-inlet and exhaust-ports are controlled by separate and distinct values." Illustration included.
Date: September 5, 1905
Creator: Moore, Ezra G. & Moore, Frank T.
Partner: UNT Libraries Government Documents Department

Dipper

Description: Patent for dipper. Illustration included.
Date: May 16, 1905
Creator: Cowart, Laurance P.
Partner: UNT Libraries Government Documents Department
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