Patents by Inventor Cheong Dong Cho

Cheong Dong Cho 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).

  • Amplifier for audio system
    Patent number: D489356
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: May 4, 2004
    Assignee: Eastern Mastec Corporation
    Inventor: Cheong Dong Cho
  • Motor vehicle surveillance camera
    Patent number: D624106
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: September 21, 2010
    Assignee: Eastern Mastec Corporation
    Inventors: Cheong Dong Cho, Jun Min Park