Patents by Inventor Kyoung R. Han

Kyoung R. Han 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).

  • Diamond golf club head
    Patent number: 5620382
    Abstract: A golf club head comprising a ball striking face with an insert of polycrystalline diamond (PCD), polycrystalline cubic boron nitride (PCBN), cemented compact, or single diamond crystal is described. Such inserts, because of their hardness and strength, provide for greater distance and accuracy of golf shots as compared to softer materials. These inserts have a mirror-like finish that is resistant to scratches, chips, and deformation.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: April 15, 1997
    Assignee: Hyun Sam Cho
    Inventors: Hyun S. Cho, Bong K. Lee, Yong I. Kim, Nam K. Jin, Kyoung R. Han