Patents by Inventor Kenji Takeyasu

Kenji Takeyasu 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).

  • Battery charger for mobile apparatus
    Patent number: 5172045
    Abstract: A battery charger includes a switching circuit (8) for supplying the current to the timer (3) from the secondary battery (6). The battery charger also includes a detecting circuit (7) for activating the switching circuit (8) by charging the voltage into the capacitor (11). Further, the battery charger includes diodes (16) and (14) for supplying the current to the timer (3) from the outside battery (22) and from the secondary battery (6) respectively, and for preventing backward current flow to the respective power sources. The battery charger of the present invention prevents overcharging and extends the lifetime of the secondary battery in the mobile apparatus.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: December 15, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Kenji Takeyasu