Patents by Inventor Stephen Chi-Yu Chien

Stephen Chi-Yu Chien 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).

  • Wood-type golf club head
    Patent number: D403037
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: December 22, 1998
    Assignee: Roger Cleveland Golf Company, Inc.
    Inventors: Daniel J. Stone, Stephen Chi-Yu Chien, Joseph Lemus, III, John A. Creel