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Box Bull and Calf Wheel Gudgeon.

Description: Patent for protection and strengthening of box bull and calf wheel gudgeons. The purpose is to prevent various troubles with well drilling (oil, etc.).
Date: July 19, 1921
Creator: Taylor, James Thomas
Partner: UNT Libraries Government Documents Department

Strap Binder or Lock and Record-Check.

Description: Patent for an improved strap-binder or lock and record-check that is "simple, effective, and comparatively inexpensive" to manufacture (lines 8-11).
Date: July 7, 1921
Creator: Glisson, Amos A.
Partner: UNT Libraries Government Documents Department

Fire-Extinguisher for Aeroplanes and the Like.

Description: Patent for a fire extinguisher apparatus to be used in air crafts, boats, and other vehicles designed to be lightweight and to quickly extinguish fires.
Date: July 5, 1921
Creator: Clark, Walter C.
Partner: UNT Libraries Government Documents Department

Method of Repairing Scored Cylinders.

Description: Patent for repairing scored cylinders in internal combustion engines by making the cylinders as smooth and hard as before they were scored and by filling the scores with metal to maintain the firmness.
Date: July 12, 1921
Creator: Eury, Zebulon J.
Partner: UNT Libraries Government Documents Department
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