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Spark Plug.

Description: Patent for a spark plug with the capacity to afford an intense spark, prevent leakage of current, and to preclude fouling of the plug in carbon.
Date: October 24, 1922
Creator: Bronson, Fred L.
Partner: UNT Libraries Government Documents Department

Electric Battery

Description: Patent for an electric battery. This battery is designed to be more efficient and run for a longer time, without adding water.
Date: October 24, 1922
Creator: Holmes, Frank M.
Partner: UNT Libraries Government Documents Department

Rural Mail Box.

Description: Patent for improvements to rural mail boxes with divided interior compartments for incoming and outgoing mail. Mail box design includes flag to signal to recipients and postman of incoming and outgoing items. Additionally the design features interior and exterior doors that can be secured with a padlock to prevent mail from being stolen or tampered with, and to shield from various weather conditions.
Date: October 24, 1922
Creator: Dooley, Will Henry
Partner: UNT Libraries Government Documents Department
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