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Keying Device for Cutter Heads

Description: Patent for a keying device for cutter heads. This invention is designed attaches cutter heads to rotate shafts to align the cutter head. Illustration included.
Date: December 10, 1912
Creator: Ash, William D. & Herndon, James A.
Partner: UNT Libraries Government Documents Department

Double-Action Hair-Clipper.

Description: Patent for an improved hair clipper design with both stationary and movable cutter blades.
Date: February 10, 1914
Creator: Appleman, Ernest E.
Partner: UNT Libraries Government Documents Department
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