Patents by Inventor Ralph L. Johnson

Ralph L. Johnson 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).

  • Blade sharpener
    Patent number: D724407
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: March 17, 2015
    Assignee: EZE-LAP Diamond Products, Inc.
    Inventor: Ralph L. Johnson