Patents by Inventor Masahisa Yamaguchi, deceased

Masahisa Yamaguchi, deceased 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).

  • Space diversity system in PCM-TDMA telecommunication system using stationary communication satellite
    Patent number: 4052670
    Abstract: A space diversity PCM-TDMA telecommunication system using a stationary communication satellite, in which fixed delay circuits are respectively inserted in the sending side and the receiving side of one route at a control equipment, while variable delay circuits are inserted in the sending side and the receiving side of the other route at the control equipment, so that electrical length of one route from the satellite to the control equipment may be the same as that of the other route from the satellite to the control equipment through the route including connection links between the two sites. Diversity switching can be performed with no duplication and lack of signals in accordance with the above construction.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: October 4, 1977
    Assignee: Kokusai Denshin Denwa Kabushiki Kaisha
    Inventors: Tatsuo Watanabe, Hideki Saito, Akira Ogawa, Masahisa Yamaguchi, deceased