Patents by Inventor Prins Shihkun Chang

Prins Shihkun 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).

  • Patent number: 6231455
    Abstract: A golf wood-club head includes a rear shell member, a face member inclinedly affixed in front of the rear shell member, a hosel, and a L-shaped connecting stem. The L-shaped connecting stem has a head connecting member horizontally and integrally extended from a side of the rear shell member, and a shaft connecting member inclinedly and upwardly extended from the head connecting member for combining together with the hosel. A ring groove is provided around the head connecting member, and a shock absorbing ring is situated around the ring groove for absorbing vibration transferring from the club head. Therefore, the golf wood-club head can increase the horizontal distance between the golf head and the player's hand without changing the lie angle of the wood-club head and the vertical distance between the golf head and the player's hand.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: May 15, 2001
    Inventor: Prins Shihkun Chang