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Casing-Pulling Apparatus.

Description: Patent for an apparatus to more easily and more economically remove well-casings from the ground when an oil well is no longer in use.
Date: November 29, 1921
Creator: Wilson, John Hart
Partner: UNT Libraries Government Documents Department

Boring and Threading Tool.

Description: Patent for an inexpensive, efficient boring and threading tool that "will enable a smooth and even surface to be produced with a minimum of skill on the part of the operator" (lines 18-21).
Date: June 21, 1921
Creator: Wells, Daniel Doolittle
Partner: UNT Libraries Government Documents Department

Calk Attachment For Horseshoes

Description: Patent for new and useful improvements in calk attachments for horseshoes. The objective is to provide detachable means applicable to the conventional types of shoe without any modifications.
Date: March 29, 1921
Creator: Douglas, John Davies
Partner: UNT Libraries Government Documents Department

Water-Motor.

Description: Patent for a more powerful and efficient water motor which is durable and comparatively affordable to manufacture.
Date: August 16, 1921
Creator: Brady, Enoch J.
Partner: UNT Libraries Government Documents Department

Automobile-Signal.

Description: Patent for turn signal improvements with an aim to improve visibility of signal and ease of replacement with the goal of communicating vehicular movement and reducing accidents.
Date: November 15, 1921
Creator: Squier, William Ernest
Partner: UNT Libraries Government Documents Department
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