Patents by Inventor Kazuzi Watanabe

Kazuzi Watanabe 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).

  • Interference cancellation circuit
    Patent number: 5046133
    Abstract: An interference cancellation circuit which can remove the interference signal caused by other systems and contained in received signals. The interference signal can be cancelled even if the interference signal is not directly obtained or plural interference signals exist, or the interference signal is a wide band signal or raster interference simply by receiving two signals which have passed through different transmission paths, combining the main signals contained in each of the received signals in a manner to offset each other to the extract interference signal, and removing the interference signal component from the received signal based on the expected interference signal.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: September 3, 1991
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kazuzi Watanabe, Masahiko Ito, Hideaki Matue