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Flour-Sifter.

Patent for a centrifugal flour sifter that removes pests, mold, and debris.

Date: September 13, 1921

Creator: Brewer, Johnson

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Guide for Drive-Chains.

Patent for a mechanism designed to prevent a guide chain from being displaced from the wheel(s) of its parent machine.

Date: May 17, 1921

Creator: Johnston, Horace G.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

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