Patents by Inventor Hisung Kwon

Hisung Kwon 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).

  • Power source switching circuit
    Patent number: 4873454
    Abstract: A new type of power source switching circuit is disclosed. In the device of the present invention, a relay is used instead of semiconductor elements which are used in the conventional types of power source switching circuit. Compared with the conventional ones, the circuit according to the present invention is much simpler, and assures the protection of the circuit against damages due to an overvoltage or impact pulses, which damages are liable to occur in the conventional types of power source switching circuit.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: October 10, 1989
    Assignee: Sam Sung Electronic Co. Ltd.
    Inventor: Hisung Kwon