Patents by Inventor Terry J. Hall, Sr.

Terry J. Hall, Sr. 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).

  • Sharpening device
    Patent number: 6875093
    Abstract: A sharpener includes a motor driven shaft with at least one slidably mounted sharpening assembly consisting of a supporting hub structure mounted by its central bore hole on the shaft. The hub structure supports a symmetrically shaped rotating surface containing an ultra fine abrasive material. The rotating surface is pressed with a force of less than 0.2 lb. by a spring action to make sustained rotating abrading contact with a facet of a knife positioned by a knife guide to align the facet into contact with the surface containing the abrasive materials.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: April 5, 2005
    Assignee: Edgecraft Corporation
    Inventors: Daniel D. Friel, Sr., Daniel D. Friel, Jr., Terry J. Hall, Sr.