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Upward-Current Separating Process and Device.

Patent for upward-current separation processes and devices to allow for working with changes in conditions and proportions with ease.

Date: July 3, 1917

Creator: Allen, Charles

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Screening Device.

Patent for a screening device that offers "an improved means for imparting motion to and controlling or varying the motion of the screen to affect a separation of the materials undergoing treatment." (lines 10-13).

Date: July 24, 1917

Creator: Cole, David