Patents by Inventor Koyo Taniguchi

Koyo Taniguchi 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).

  • Patent number: 4471491
    Abstract: A service channel signal transmission system in which a service channel signal is constantly fed to at least two radio channels in parallel. Each intermediate repeater station has a service channel demodulator which is constantly connected to either one of the radio channels. A combining and switching circuit automatically switches over the service channel demodulation to the other radio channel in response to an alarm output which indicates an abnormality in a received signal at a receiver associated with the one radio channel. The service channel is completely switched from one to the other without resorting to line switchover control signals from terminal stations.
    Type: Grant
    Filed: February 1, 1983
    Date of Patent: September 11, 1984
    Assignee: Nippon Electric Company, Ltd.
    Inventors: Akira Abe, Hiromi Hashimoto, Toshiyuki Takenaka, Koyo Taniguchi