Description: Patent for improvements to sharpening the disk harrows by attaching a disk sharpener onto the frame of the disk harrow so as the harrow is being drawn across the field, the rotating disk harrow comes into contact with the sharpener. Includes instructions and illustrations.
Date: November 25, 1913
Creator: Lammon, Harry
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department