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Internal-Combustion Engine.

Description: Patent for an internal combustion engine, which can be run with less fuel and better control of the engine.
Date: February 1, 1910
Creator: Reaugh, Frank
Partner: UNT Libraries Government Documents Department

Perpetual Calendar.

Description: Patent for the improvement of calendars to create easier-to-read and quicker-to-adjust. These calendars were to be able to be used no matter the month or year and would always be accurate.
Date: February 1, 1921
Creator: Jones, L. Walter
Partner: UNT Libraries Government Documents Department
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