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Impact-Motor.

Description: Patent for a rotary motor "to provide a simple and efficient motor particularly adaptable for vehicle propulsion and which when once started in either direction will automatically arrange its valve to continue that direction of rotation" (lines 13-18), including illustrations.
Date: November 12, 1901
Creator: Hahn, Carl
Partner: UNT Libraries Government Documents Department

Air-Compressing Apparatus.

Description: Patent for a new air compressing apparatus which employs two kinds of tanks called high pressure containers and low pressure containers charged by means of an air compressing engine.
Date: March 16, 1915
Creator: Gebhardt, William Charles
Partner: UNT Libraries Government Documents Department