Patents by Inventor Yook J. Ching

Yook J. Ching 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).

  • Heel structure for shoes
    Patent number: 4318232
    Abstract: The heel of a shoe is formed with replaceable inserts or knobs that may be formed of material that is the same as or different from the material of the heel and the manner of mounting is such that a user may readily replace the inserts to prevent or limit wear of the shoe heel.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: March 9, 1982
    Inventor: Yook J. Ching