Patents by Inventor Yuichi Sagawa

Yuichi Sagawa 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).

  • ATM cell transport system for wireless communications
    Patent number: 6188697
    Abstract: An asynchronous transfer mode (“ATM”) cell transfer system in a wireless communication system provides quality classes that correspond to the amount of cell transfer delay allowed. Cells are classified according to a quality class and stored in buffers. The cells are read starting from the buffer for the quality class with the highest priority, and successively from buffers for quality classes of lower priority. Alternatively, if there is room in the output interval of cells of a higher priority quality class, cells of a lower quality class are inserted among these cells.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: February 13, 2001
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Masahiro Umehira, Hijin Satoh, Takatoshi Sugiyama, Atsushi Ohta, Yuichi Sagawa