Patents by Inventor Pertti Salonen

Pertti Salonen 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).

  • Arrangement for the control of an echo canceller
    Patent number: 5450487
    Abstract: The operation of an echo canceller (4A to 4D) is controlled by a call control (2) of a telephone exchange over an internal control bus (3, 5) of the telephone exchange. The exchange then attends to the necessary signalling and the echo canceller does not need to know how the associated signalling is routed in the telephone network.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: September 12, 1995
    Assignee: Nokia Telecommunications Oy
    Inventors: Heimo Lahdemaki, Vesa Sarkikangas, Pertti Salonen