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Sand Screen

Description: Patent for a sand screen. This invention is for sifting and screening sand. Illustration included.
Date: October 25, 1910
Creator: Tress, Paul G.
Partner: UNT Libraries Government Documents Department

Engine.

Description: Patent for a new engine designed to maximize power output by using a single crank's bearing surface and increase the crank power without lengthening the piston travel.
Date: October 18, 1921
Creator: Ingram, Joseph D.
Partner: UNT Libraries Government Documents Department
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