Patents by Inventor Naritatsu Yamamoto

Naritatsu Yamamoto 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).

  • Mobile communication terminal
    Patent number: 6975870
    Abstract: A mobile communication terminal including a radio unit for establishing radio communications with radio base stations, a GPS receiving unit for measuring a position of its own, and a control unit. The control unit detects reception condition of radio waves from a radio base station and a distance to the station, selecting the most suitable radio base station to be communicated with based on the detected results.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: December 13, 2005
    Assignees: Sanyo Electric Co., Ltd., Sanyo Telecommunications Co., Ltd.
    Inventors: Hisatomo Kato, Naritatsu Yamamoto
  • Mobile communication terminal
    Publication number: 20020187792
    Abstract: A mobile communication terminal of the present invention comprises a radio unit 2 for establishing radio communications with radio base stations, a GPS receiving unit 4 for measuring a position of its own, and a control unit 5. The control unit 5 detects reception condition of radio waves from a radio base station and a distance to the station, selecting the most suitable radio base station to be communicated with based on the detected results.
    Type: Application
    Filed: April 11, 2002
    Publication date: December 12, 2002
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Hisatomo Kato, Naritatsu Yamamoto