Patents by Inventor Kwang-hyuk Chang

Kwang-hyuk 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).

  • Method of manufacturing a multilayer information disc
    Patent number: 5686225
    Abstract: A multilayer information disc formed by joining a plurality of disc units and a manufacturing method thereof are provided. The plurality of disc units contain information tracks which have the same spiral directions relative to an optical pickup device when the plurality of the disc units are joined. As a result, information recorded on all of the disc units can be reproduced by rotating the multilayer information disc in a single direction. Consequently, the structure and cost of the recording/reproducing apparatus which reproduces the information is reduced.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: November 11, 1997
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kwang-hyuk Chang