Patents by Inventor Ronald T. Keown

Ronald T. Keown 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).

  • Card holder
    Patent number: D329558
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: September 22, 1992
    Assignee: USA Enterprises, Inc.
    Inventor: Ronald T. Keown