Patents by Inventor Yoon Chol Chang

Yoon Chol Chang 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).

  • Big toe pinky toe sock
    Patent number: D610791
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 2, 2010
    Inventor: Yoon Chol Chang