Patents by Inventor Eiji Kamagata

Eiji Kamagata 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).

  • Radiocommunication system
    Patent number: 5661723
    Abstract: An ATM-based radiocommunication system adapted for multimedia communication comprises a repeater for providing communication services over a predetermined service area, first radio terminals for communicating with the repeater by using ATM cells, and a second terminal for communicating with the repeater by using ATM cells and communicating with a backbone network.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: August 26, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Motoharu Ueno, Yoshinari Kumaki, Katsuya Nonin, Eiji Kamagata, Shigeo Matsuzawa
  • Radiocommunication system
    Patent number: 5553069
    Abstract: An ATM-based radiocommunication system adapted for multimedia communication comprises a repeater for providing communication services over a predetermined service area, first radio terminals for communicating with the repeater by using ATM cells, and a second terminal for communicating with the repeater by using ATM cells and communicating with a backbone network.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: September 3, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Motoharu Ueno, Yoshinari Kumaki, Katsuya Nonin, Eiji Kamagata, Shigeo Matsuzawa
  • Cell switch and cell switch network using dummy cells for simplified cell switch test in communication network
    Patent number: 5477549
    Abstract: A cell switch and a cell switch network with a simplified cell switch testing such that the testing processes can be carried out quickly and easily. The cell switch includes a dummy cell generation circuit for generating dummy cells in correspondence to the output transmission paths; and an output control circuit for selectively outputting the dummy cells to the output transmission paths when a test of the cell switch is indicated by an externally provided control signal. In a cell switch network in which the cell switches are interconnected in a form of a multi-step configuration, the cell switches belonging to each step in the multi-step configuration of the cell switch network is tested sequentially, by supplying the control signal to each of the cell switches belonging to each step in the multi-step configuration of the cell switch network sequentially, in a reverse order of steps in the multi-step configuration of the cell switch network.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: December 19, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Eiji Kamagata, Yasuro Shobatake