Patents by Inventor Norio Imanishi

Norio Imanishi 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).

  • Buffer memory dispersion type video/audio transmission system with spatially and timewise divided inter-office junction lines
    Patent number: 4518989
    Abstract: A video/audio transmission system for sending video and audio information from the video and audio files of a center to a subscriber through a subscriber's junction line is disclosed in which at least one subcenter is disposed near to the subscriber to reduce the number of repeaters arranged on the subscriber's junction line. The subcenters can include a video/audio buffer memory, and exchange and other related circuits. The transmission lines for sending the video and audio information from the center to the sub-center are spatially divided into a plurality of groups in accordance with the sort of the video and audio information being sent, and further the information is time-divisionally transmitted at each group.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: May 21, 1985
    Assignees: Hitachi, Ltd., Nippon Telegraph & Telephone Public Corporation
    Inventors: Akira Yabiki, Norio Imanishi, Yoji Shibata, Wataru Kosuge, Nobumichi Yukawa