Patents by Inventor Keiji Takao

Keiji Takao 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).

  • Navigation apparatus for vehicles
    Patent number: 5293163
    Abstract: A navigation apparatus for vehicles according to the present invention has a display device for displaying road information. The navigation system is designed to selectively display the road information which is close to the current position of the vehicle and/or the demands of the driver from a large amount of road information (each of which consists of image data to be displayed and logical data on which logical determination can be made).
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: March 8, 1994
    Assignee: Mazda Motor Corporation
    Inventors: Masaki Kakihara, Masao Sasaki, Yasuyuki Masaki, Tatsuaki Taniguchi, Toshihiko Okamoto, Futoshi Shoji, Keiji Takao
  • Vehicular radio receiver having muting circuitry for suppressing noises caused by receiver data pulses
    Patent number: 5263190
    Abstract: A vehicular radio receiver includes a receiver main body provided adjacent to an antenna mounted on a vehicle body, a receiver operation unit provided in a compartment of the vehicle spaced from the receiver main body for sending a pulse signal for operating the receiver main body thereto, and a control circuit for forcibly and continuously lowering an output derived from the receiver main body during a time in which the pulse signal is transmitted from the receiver operation unit. Noises caused by the pulse signal transmitted to the receiver main body from the receiver operation unit are prevented from being audibly output from a speaker.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: November 16, 1993
    Assignee: Mazda Motor Corporation
    Inventors: Tatsuaki Taniguchi, Keiji Takao