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Automatic Density-Indicator for Slime-Pulp Separators.

Description: Patent for devices that thickens slimes for ore milling operations in which it will indicate the density and regulate it so it will not go below a predetermined value.
Date: June 22, 1920
Creator: Allen, Charles
Partner: UNT Libraries Government Documents Department

Automobile-Radiator.

Description: Patent for improvements in automobile radiators to provide the ability to remove the top and the bottom of the tanks so they can be easily reached for replacement and repair.
Date: June 15, 1920
Creator: Costelloe, Clinton & Stoll, Sherm G.
Partner: UNT Libraries Government Documents Department
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