Patents by Inventor Young-gyo Choi

Young-gyo Choi 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).

  • Preparation method of 1,5-dimethyltetralin using dealuminated zeolite beta catalyst
    Publication number: 20070232842
    Abstract: The present invention relates to a method for preparing 1,5-dimethyltetralin using a dealuminated zeolite beta catalyst. The preparation method of 1,5-dimethyltetralin according to the present invention has the effects of not only showing high conversion and high selectivity of 1,5-dimethyltetralin but also of suppressing deactivation of a zeolite beta catalyst so as to enhance the catalyst life, by using the dealuminated zeolite beta catalyst.
    Type: Application
    Filed: October 10, 2006
    Publication date: October 4, 2007
    Applicant: HYOSUNG CORPORATION
    Inventors: Byoung-Whan Soh, Young-Gyo Choi
  • Magnet recording/reproducing apparatus with video camera, suited for photorecording without attending camera operator
    Patent number: 6519416
    Abstract: Recording/reproducing apparatus including recording electronics and playback electronics and a radio receiver responsive to a selected television signal for supplying a composite video signal to the recording electronics at selected times are contained within a unitary package designed to rest on a surface. A video camera supplies composite video signal for selective application tothe recording electronics at other times, the supplying of those composite video signals to said recording electronics being done by means other than cabling from the video camera to the unitary package. The video camera is included within the same unitary package as the magnetic recording/reproducing apparatus in some systems, thus to eliminate cabling from the video camera to the unitary package.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: February 11, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-gyo Choi, Bong-rae Park, Allen LeRoy Limberg
  • Magnetic recording/reproducing apparatus with video camera, suited for photorecording without attending camera operator
    Patent number: 5604551
    Abstract: Recording/reproducing apparatus including recording electronics and playback electronics and a radio receiver responsive to a selected television signal for supplying a composite video signal to the recording electronics at selected times are contained within a unitary package designed to rest on a surface. A video camera supplies composite video signal for selective application to the recording electronics at other times, the supplying of those composite video signals to said recording electronics being done by means other than cabling from the video camera to the unitary package. The video camera is included within the same unitary package as the magnetic recording/reproducing apparatus in some systems, thus to eliminate cabling from the video camera to the unitary package.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: February 18, 1997
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-gyo Choi, Bong-rae Park, Allen L. Limberg