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Safety-Razor-Blade Sharpener.

Description: Patent for a safety razor blade sharpener with an improved arrangement of the metal grinding elements and a novel blade holder that can hold various types of blades and sharpen both sides, including illustrations.
Date: May 8, 1917
Creator: Hauser, Peter D.
Partner: UNT Libraries Government Documents Department

Hoe-Sharpening Device.

Description: Patent for a mechanical hoe sharpening device with a holder for the hoe blade and a file that is operated by a lever.
Date: May 21, 1907
Creator: Criddle, Thomas B.
Partner: UNT Libraries Government Documents Department
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