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Boring-Tool.

Description: Patent for "a boring tool for boring scarred and worn engine cylinders" (lines 14-15) that allows for more customization when cutting.
Date: January 4, 1921
Creator: Adams, George Reese.
Partner: UNT Libraries Government Documents Department

Tractor

Description: Patent for an improved tractor where the "propelling force is delivered through traction blocks...(lines 11-12)."
Date: March 22, 1921
Creator: Aerl, Van Vivian
Partner: UNT Libraries Government Documents Department
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