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Rotary Engine

Description: Patent for a rotary steam engine with an improved steam cylinder.
Date: December 3, 1912
Creator: Lawrenson, Judge Peck
Partner: UNT Libraries Government Documents Department

Catamenial Applicance

Description: Patent for a catamenial appliance that can be worn like an apron. In conjunction with a "napkin the device can prevent outer garments from stains during or prior to menstruation" (p. 1, lines 10-15)
Date: December 29, 1914
Creator: Myers, Jennie C.
Partner: UNT Libraries Government Documents Department

Churn.

Description: Patent for improvements in churns that are made with an actuating motor, including illustrations and instructions.
Date: December 18, 1917
Creator: Waller, Charles Floyd
Partner: UNT Libraries Government Documents Department
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