Patents by Inventor Seong W. Jo

Seong W. Jo 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 for checking abnormal operations of video cassette recorder
    Patent number: 5604647
    Abstract: The present invention relates to a video cassette recorder (VCR). The present invention decides the mode conversion of the VCR by checking the mode switch signal and displays the mode error data in the abnormal mode conversion, Also, the present invention decides the operation state corresponding to each mode by using the reel pulse and drum pulse and displays the error data if in an abnormal state, thereby informing the users whether the VCR is normal or not.
    Type: Grant
    Filed: July 8, 1991
    Date of Patent: February 18, 1997
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Seong W. Jo