Patents by Inventor Mituru Tanaka

Mituru Tanaka 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).

  • Radio telephone set used as portable set and vehicle-mounted set
    Patent number: 4962523
    Abstract: A radio telephone set comprises switch circuitry, a telephone circuit and a battery for portable operation, which battery may be a built-in battery. When the radio telephone set is not mounted on a vehicle, the switch circuitry is not connected to a battery of the vehicle and feeds power from the built-in battery to the telephone circuit. Thus, the radio telephone set can be used as a portable set. When the radio telephone set is mounted on the vehicle, the switch circuitry is connected to the vehicle battery and this connection causes the automatic switching of the power supply to the telephone circuit from the built-in battery to the vehicle battery. Thus, the radio telephone set can be used as a vehicle-mounted, or onboard, set.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: October 9, 1990
    Assignee: NEC Corporation
    Inventor: Mituru Tanaka