Patents by Inventor Hsing-Chju Chang

Hsing-Chju 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: 5988375
    Abstract: A disc box structure including a box body and a cover body pivotally connected with one side of the box body. An annular stepped projection is formed in the box body. The center of the annular projection is disposed with two opposite lifted engaging members. The lower ends of the engaging members are connected with the bottom face of the box body, while the upper ends of the engaging members are disposed with substantially semicircular opposite fitting ribs. An engaging projection is formed on an upper end of a middle section of the outer edge of each fitting rib. The inner edges of the opposite fitting ribs have several inward extending resilient bridge ribs which commonly connect with a pressing member, whereby-the engaging members have better structural strength and are protected from breaking due to shearing force of the disc. When it is desired to take out the disc, a user only needs to depress the pressing member between the engaging members to easily take out the disc.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: November 23, 1999
    Assignee: Snyr Yih Metallic Co., Ltd.
    Inventor: Hsing-Chju Chang