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Wrench

Description: Patent for an improvement in the design of wrenches, particular for heavy work such as deep well drilling, but still being able to be designed at smaller sizes to handle lighter work.
Date: April 11, 1922
Creator: Reed, Clarence E.
Partner: UNT Libraries Government Documents Department

Photoprinter.

Description: Patent for a photograph printer that includes a mask mechanism to create prints of different sizes. Construction is such that the person using the printer can work the printer accurately and quickly complete work.
Date: April 11, 1922
Creator: Lockhart, William E.
Partner: UNT Libraries Government Documents Department
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