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Oscillating Engine

Description: Patent for improvements to oscillating steam engines, including illustrations and instructions.
Date: February 26, 1884
Creator: Gilbert, John Oakley
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