Patents by Inventor Tan V. Doan

Tan V. Doan 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).

  • Method and apparatus for echo canceling in a communication system
    Patent number: 5553137
    Abstract: A communication system including a base station (102) and a handset (104) provides a reduced level of near end reflections which results in a reduced level of sidetone for both near end and far end users. The base station includes an echo canceler (124) that trains on noise generated by the echo canceler (124) during inter digit dialing.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: September 3, 1996
    Assignee: Motorola, Inc.
    Inventors: Scott O. Nyhart, Tan V. Doan