Patents by Inventor Woong-Jae Choi

Woong-Jae Choi 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).

  • Practice golf club
    Patent number: 6398664
    Abstract: The present invention relates to a practice golf club which enables a beginner to learn not to reduce his driving range and correct an impact misbehavior due to an excessive force on a grip during a downswing by himself.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: June 4, 2002
    Inventor: Woong-Jae Choi