Patents by Inventor Chong-Dai Hwang

Chong-Dai Hwang 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).

  • Vise with selectable jaw faces
    Patent number: 4133519
    Abstract: In a vise, such as now commonly used to hold a workpiece for drilling, cutting and finishing, the stationary main body is provided with a replaceable jaw member having a plurality of jaw faces, and the adjustible jaw body is formed as a jaw unit having a plurality of jaw plates. Both of the jaw member and the jaw unit are adapted to rotate so that any of the jaw faces and/or the jaw plates can be selected off-handedly in accordance with the kind and shape of a workpiece to insure an ideal grip of the piece.
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: January 9, 1979
    Assignee: Kyoung-Ho Shin
    Inventors: Kyoung-Ho Shin, Chong-Dai Hwang