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Trowel.

Description: Patent for "new and useful improvements in Trowels." (lines 8-9) including instructions and illustrations.
Date: March 2, 1920
Creator: Parker, Barton J.
Partner: UNT Libraries Government Documents Department

Method of Regulating the Load on Rotary Drills.

Description: Patent for regulating the load on rotary drills, specifically those used in the oil and gas industry.
Date: November 2, 1920
Creator: Hughes, Howard R.
Partner: UNT Libraries Government Documents Department

Power Generating Unit for Locomotive Headlights

Description: Patent for an invention that makes the manufacturing of headlights inexpensive, while also keeping the headlights durable and able to fit in a relatively small space.
Date: November 2, 1920
Creator: Lacey, Benjamin Burton
Partner: UNT Libraries Government Documents Department
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