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Pump Piston

Description: Patent for an "Improvement in Pump-Pistons" (lines 5-6) including illustrations.
Date: January 13, 1920
Creator: Humason, Granville A.
Partner: UNT Libraries Government Documents Department

Slime-Pulp Thickener

Description: Patent for a device for thickening slime or pulp in the treating of ores wet milling. The device controls the disbursement of slim pulp in the thickener, producing a better solid to liquid ratios.
Date: August 17, 1920
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department
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