Patents by Inventor Ishii Takaaki

Ishii Takaaki 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).

  • Method and apparatus for reducing power consumption in a radio telecommunication apparatus
    Patent number: 5203020
    Abstract: A radio telecommunication apparatus is used in a radio telecommunication system wherein one or more base stations broadcast radio signals over a plurality of radio channels. The apparatus selects at least a radio channel out of the plurality of radio channels and detects the availability of the selected radio channel. In response to the unavailability of the selected radio channel, the apparatus is intermittently powered so as to detect the availability of the selected radio channel while conserving battery power consumption. Even if the availability of the selected radio channel is detected, only reception and transmission sections are intermittently powered so that the presence of information signals to be transmitted is detected.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: April 13, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Sato, Kita Katsuhiko, Ishii Takaaki