Patents by Inventor Yeong J. Joo

Yeong J. Joo 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).

  • Patent number: 5461437
    Abstract: A VTR equipped with an LCD projector integral therewith, capable of eliminating the complexity of wirings and preventing degradation of video signals. The VTR includes a front screen, a rear screen disposed on a front panel of a VCR body and constructed to be openable and closable for the LCD projector projecting the image, a closing detecting unit for detecting an openable or closable state of the rear screen, an image inverting unit for laterally inverting a direction of the image to be projected onto the rear screen, the rear screen being opened when a viewer observes the image projected on the front screen, while being closed when the viewer observes the image projected on the rear screen, the detecting unit informing the image inverting means of the closed state of the rear screen, and the image inverting unit laterally inverting the image to be projected onto the rear screen upon receiving the information.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: October 24, 1995
    Assignee: Goldstar Co., Ltd.
    Inventors: Sumio Tanaka, Yeong J. Joo
  • Patent number: 5175485
    Abstract: An apparatus for controlling charging of a storage battery that initially charges the storage battery in a constant current charging mode and then in a constant voltage charging mode when the charging voltage across the storage battery reaches a desired value.
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: December 29, 1992
    Assignee: Gold Star Co., Ltd.
    Inventor: Yeong J. Joo