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Trailer.

Description: Patent for improved construction and arrangement of trailers. This improvement will allow an easy turning movement where a number of trailers are connected while admitting of strain between the various trailers when they are turning a corner or going around a curve.
Date: August 20, 1918
Creator: Watkins, Leigh
Partner: UNT Libraries Government Documents Department

Process of Treating Slag and Furnace Therefor.

Description: Patent for a process of treating slag and furnace therefore. It has an improved method for separates melted metals produced during smelting and extracting the precious metals from slag. The richer matte and base-bullion run off separately and into separate taps.
Date: August 20, 1895
Creator: van Cleve, Charles M. & Rhodes, Robert D.
Partner: UNT Libraries Government Documents Department

Extracting Metals from Ores

Description: Patent for the extraction of metals from ores by developing an improvement to the cynid process.
Date: August 20, 1918
Creator: Biesel, C.
Partner: UNT Libraries Government Documents Department

Continuous Vacuum Dehydrator.

Description: Patent for improvements in speed, cheapness, and more efficiency in continuous-vacuum dehydration and filtering for the purpose of extracting valuable ores with water including instructions and illustrations.
Date: August 20, 1918
Creator: Biesel, Charles
Partner: UNT Libraries Government Documents Department
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