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Sign.

Description: Patent for signs, bulletin boards and other display apparatus; the purpose of this device is that display elements may be reversed from time to time to change announcement displayed.
Date: June 21, 1921
Creator: Nowlin, Aubrey C.
Partner: UNT Libraries Government Documents Department

Cotton-Chopper.

Description: Patent for effective removal of cotton plants in an alternating pattern with a standard chopping depth, distance, and speed, with illustrations.
Date: June 28, 1921
Creator: Antoni, Ernst J.
Partner: UNT Libraries Government Documents Department
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