Patents by Inventor Henry M. L. Chong

Henry M. L. Chong 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).

  • Telephone tone dialer
    Patent number: D339140
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: September 7, 1993
    Assignee: Telean Technology Limited
    Inventor: Henry M. L. Chong