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Incubator

Description: Patent for an incubator designed to maintain temperature automatically.
Date: September 27, 1921
Creator: Kovar, Joe
Partner: UNT Libraries Government Documents Department

Gearing.

Description: Patent for a speed transmission device that simply and efficiently changes the gears in an automobile especially at fluctuating speeds.
Date: September 13, 1921
Creator: Anderson, Bert
Partner: UNT Libraries Government Documents Department
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