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Railroad Tie

Description: Patent for metallic railroad ties. This invention is for a solid state tie. It uses extending bolts to lock the ties into place. Illustration included.
Date: November 19, 1907
Creator: Mayo, William C.; Houlehan, John & Briggs, George Edwin
Partner: UNT Libraries Government Documents Department

Gas Engine

Description: Patent for gas engine. Illustrations included.
Date: November 19, 1907
Creator: Houlehan, John & Mayo, William C.
Partner: UNT Libraries Government Documents Department

Automatic Train Signal

Description: Patent for new automatic train signal. It was invented to improve train signaling systems for automatic trains.
Date: November 19, 1918
Creator: Bulla, Melburn Bernie
Partner: UNT Libraries Government Documents Department
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