Patents by Inventor Chung Dong Cho

Chung 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).

  • Speaker system
    Patent number: D442165
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: May 15, 2001
    Inventor: Chung Dong Cho
  • Pair of speakers
    Patent number: D425897
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: May 30, 2000
    Assignee: Eastern Acostic Corp.
    Inventor: Chung Dong Cho
  • Speaker system
    Patent number: D429237
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: August 8, 2000
    Assignee: Eastern Acostic Corp.
    Inventor: Chung Dong Cho