Patents by Inventor Sam S. Yoon

Sam S. Yoon 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).

  • Protective shoe apparatus
    Patent number: 4972609
    Abstract: A protective shoe is disclosed herein for use in the martial arts. The shoe provides a protective shoe upper and an elastic strap which is wrapped partially around the foot to snugly secure the shoe to the foot.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: November 27, 1990
    Assignee: Pioneer Interstate, Inc.
    Inventors: Thomas J. Oh, Sam S. Yoon, Sa H. Chong