Patents by Inventor Tomohisa Hagino

Tomohisa Hagino 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).

  • Pulse charging method for rechargeable batteries
    Patent number: 5808447
    Abstract: This charging method repeatedly charges and suspends charging to pulse charge a rechargeable battery. Open circuit battery voltage is measured during periods of suspended charging and charging is resumed when the measured voltage drops below a specified voltage. When the period of suspended charging is longer than a specified time, open circuit battery voltage is compared to a minimum voltage. When the open circuit battery voltage is greater than the minimum voltage and the period of suspended charging is longer than the specified time, the battery is considered fully charged. When the open circuit battery voltage is less than the minimum voltage, even though the period of suspended charging is longer than the specified time, the battery is assumed to be removed from the system.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: September 15, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Tomohisa Hagino