Patents by Inventor Seung T. Chung

Seung T. Chung 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).

  • Laser drum for use in recording and reproducing information on optical tapes
    Patent number: 4807213
    Abstract: A laser drum which can optically record and reproduce information on optical tapes. The laser drum comprises an upper drum which has two projection holes, rotates and is fitted with semiconductor lasers, a total reflective prism, stoppers, diffraction gratings, beam splitters, object lenses, condensing lenses and photodetectors.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: February 21, 1989
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung T. Chung, Hae W. Kwon, Tae S. Park