Patents by Inventor Toshihide Hiraoka

Toshihide Hiraoka 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).

  • Remote power feed method and system
    Patent number: 6847718
    Abstract: A remote power feeding method allowing efficient remote power feeding into a network termination device in the event of a commercial power failure at a subscriber site is disclosed. When the commercial power failure occurs, a power failure signal is transmitted from the subscriber-side network termination device to the central office-side line termination device. The central office-side line termination device, when receiving the power failure signal, starts DC power feeding to the subscriber-side network termination device via the subscriber line. During the power failure, only voice communication is permitted using previously selected good channels.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: January 25, 2005
    Assignee: NEC Corporation
    Inventor: Toshihide Hiraoka