Patents by Inventor Oh-Seol Kwon

Oh-Seol 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).

  • Tone-type recognition method
    Patent number: 5063593
    Abstract: There is disclosed a tone type recognition method capable of recognizing a call progress state of a central office line switching system by using a tone detector. The method enables the system to correctly recognize the type of call progress tone, regardless of its frequency, by conducting periodic detection of characteristics of cadence classified by tone-type.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: November 5, 1991
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Oh-Seol Kwon