Patents by Inventor Tsuneyoshi Isozaki

Tsuneyoshi Isozaki 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).

  • Relay drive unit
    Patent number: 8896981
    Abstract: A relay drive unit drives a relay by supplying a power source voltage from a battery. The relay drive unit includes a power source voltage detector, a drive signal generator, and a relay drive circuit. The power source voltage detector detects the power source voltage. The drive signal generator generates a PWM signal as a drive signal for maintaining the relay in an ON state. The PWM signal has a preset duty ratio according to a magnitude of the power source voltage detected by the power source voltage detector. The relay drive circuit turns a supply of the power source voltage from the battery on/off based on a duty ratio of the drive signal generated by the drive signal generator.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: November 25, 2014
    Assignee: DENSO CORPORATION
    Inventors: Ryo Adachi, Akito Itou, Katsumi Matsuo, Tsuneyoshi Isozaki