Patents by Inventor Sang W. Ryu

Sang W. Ryu 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).

  • Control method for limiting watching distance in television
    Patent number: 4835614
    Abstract: A control method wherein a TV receiver, under the programmed control of a microcomputer, prevents infrared signals from a remote control transmitter and a watch-distance-limit-device transmitter from interferring with each other while using only one time-shared receiver for both functions.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: May 30, 1989
    Assignee: Goldstar Co., Ltd.
    Inventor: Sang W. Ryu