Patents by Inventor Isao Ogata

Isao Ogata 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).

  • Digital radio system including repeater equipment, end equipment and receiver
    Patent number: 5875209
    Abstract: A digital radio system able to efficiently maintain transmission quality, provided with repeater equipment including a plurality of pairs of regenerating units for individually receiving waves of upstream and downstream routes at repeating points of redundantly configured radio transmission lines formed under a full duplex mode and demultiplexing and extracting the transmission information and control information multiplexed in the received wave. The digital radio system further includes a plurality of pairs of repeating units for multiplexing the transmission information and controlling information individually extracted by the plurality of pairs of regenerating units and relaying the multiplexed information to the following repeater sections through the redundantly configured radio transmission lines.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: February 23, 1999
    Assignee: Fujitsu Limited
    Inventor: Isao Ogata