Patents by Inventor Akira Kitazawa

Akira Kitazawa 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).

  • Multiplexed telecommunication systems
    Patent number: 4347605
    Abstract: A multiplexed telecommunication system includes two looped transmission lines connecting a plurality of stations. Each station transmits along both looped lines and receives only from the first line. If a fault condition occurs, the station receives only from the second line, by automatically changing the receiving switch.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: August 31, 1982
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Masao Hashizume, Akira Kitazawa