Patents by Inventor Yutaka Netsu

Yutaka Netsu 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).

  • Duplex switching apparatus
    Patent number: 5715074
    Abstract: A duplex switching apparatus for an optical burst signal multiplex transmission system includes a spare and current system optical subscriber line terminating sections. The spare system optical subscriber line terminating section includes a distance measuring section for measuring relative distance values from subscriber units to the spare and current system optical subscriber line terminating sections, a first calculation circuit for calculating spare system distance values to the subscriber units, a second calculation circuit for calculating spare system reception/transmission phase information, and a notification section for notifying the current system optical subscriber line terminating section of the spare system reception/transmission phase information.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: February 3, 1998
    Inventor: Yutaka Netsu