Patents by Inventor Mitoshi Fujimoto

Mitoshi Fujimoto 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).

  • Patent number: 6115426
    Abstract: An adaptive communication apparatus for use in a multicarrier transmission system in which data sequence to be transmitted is divided into a plurality of data sequences, and these data sequences are converted into a high-frequency signal including a plurality of carriers allocated different frequencies and radio-transmitted in parallel. In the adaptive communication apparatus, a received high-frequency signal is separated into a plurality of carriers by a wave separator. The frequency characteristic of the received high-frequency signal is corrected by a frequency characteristic compensation unit. The frequency characteristic compensation unit is controlled by a controller through use of the high-frequency signal subjected to signal processing by the frequency characteristic compensation unit and the wave separator.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: September 5, 2000
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Mitoshi Fujimoto, Tsutayuki Shibata, Noriyoshi Suzuki, Chisato Endo
  • Patent number: 5166693
    Abstract: In mobile communications, it is required that the beam direction is maintained to track the desired direction as the mobile is moving. For such a purpose, the mobile includes an angular rate sensor mounted therein which detects the state of turn in the mobile and to control the beam direction of the antenna in accordance with the state of turn as well as the strength of radiowave received by a receiver in the mobile. Antenna elements are in the form of microstrip antenna and are arranged in plane on the same dielectric substrate. Feeding and drive circuit layers for controlling the transmission and reception at the antenna elements are stacked into a single layered unit. This enables the antenna system to be formed into a low-profile structure. The dielectric substrate of the microstrip antenna element is formed by stacking a plurality of dielectric substrate different in dielectric constant from one another.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: November 24, 1992
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Kunitoshi Nishikawa, Kazuo Sato, Tomoaki Hirako, Mitoshi Fujimoto
  • Patent number: 4949268
    Abstract: A land vehicle navigation system is adapted to display the present position of a vehicle by receiving signals from a combination of satellites under the global positioning navigation system. The present position of the vehicle is displayed on a screen, superposed over map data. To obtain the best global positioning data, the combination of satellites is selected in connectio with the visibility. To perform the positive reception of signals from the satellites as the vehicle is running in an urban area, data relating to the building height around the area can be obtained from a geographical information section including data indicative of the map and the building height distribution with respect to the area to determine the visibility.
    Type: Grant
    Filed: September 22, 1988
    Date of Patent: August 14, 1990
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Kunitoshi Nishikawa, Mitoshi Fujimoto, Yoshikazu Asano
  • Patent number: 4907006
    Abstract: An antenna to be mounted on a vehicle. The antenna includes a ground plate with an L-shaped radiator plate and an L-shaped sub-radiator plate. One leg of the radiator plate and sub-radiator plate are parallel to the ground plate. The parallel legs are spaced from the ground plate. The other leg is perpendicular to the ground plate. The perpendicular leg is separated from the ground plate by a small gap. The two legs are opposed to each other with a gap between the legs parallel to the ground plate. In some embodiments, filler is placed between the plates.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: March 6, 1990
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Kunitoshi Nishikawa, Mitoshi Fujimoto