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Domino-Shuffler.

Description: Patent for an invention that mechanically shuffles dominoes.
Date: January 21, 1919
Creator: Eichblatt, Otto H.
Partner: UNT Libraries Government Documents Department

Sampling Device

Description: Patent for a machine that will remove samples from a well during drilling operations.
Date: October 21, 1919
Creator: Dodds, Redus D.
Partner: UNT Libraries Government Documents Department

Break-Out Pin.

Description: Patent for a modified break-out pin on an oil derrick which makes it easier to release a wrench for unscrewing pipes when done, but still holds the wrench in place while in use.
Date: October 21, 1919
Creator: Headrick, James O.
Partner: UNT Libraries Government Documents Department

Acetylene-Gas Generator.

Description: Patent for an acetylene gas generator that automatically feeds carbide into the water tank and cleans the feed valve.
Date: January 21, 1919
Creator: Furr, Oscar M.
Partner: UNT Libraries Government Documents Department
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