Patents by Inventor Robert Eugene Kauffman

Robert Eugene Kauffman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11945072
    Abstract: An apparatus comprising a cylindrical die holder base containing two recessed compartments, two different abrasive coated sharpen dies, a cylindrical index containing drill bit guide holes used to align drill bit dead center with the sharpening dies, male and female hemispheres on the index and the base to ensure alignment, a spring assembly allowing for separation of index from base while rotating index, a cylindrical safety guard used to cover index holes that are not aligned with sharpening dies, a locking knob used to lock and unlock index to base to allow or disallow rotation, and a radiused handle with a flat bottom used to safely hold drill sharpening device down on a flat surface while in use.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 2, 2024
    Inventors: Bryan Chad Thomas, Robert Eugene Kauffman