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Sign.
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.
System:
The Portal to Texas History
Cotton-Chopper.
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.
System:
The Portal to Texas History