Patents by Inventor Kazutoshi Ishiguro

Kazutoshi Ishiguro 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).

  • Patent number: 5302887
    Abstract: A charging apparatus includes a microcomputer which turns a transistor on so as to supply a charging current from a constant current source to a battery pack incorporating a secondary battery. The microcomputer counts a time required for increasing a battery voltage of the secondary battery, which is outputted from an A/D converter, by a predetermined value, and predicts a time during when the battery voltage will be subsequently increased by the predetermined value. If the battery voltage is not increased by the predetermined value within a predicted time, the microcomputer determines that the battery voltage reaches a peak value thereof and turns the transistor off to terminate a charge. The charging apparatus is suitable for a rapid charge of Ni-MH batteries.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: April 12, 1994
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazutoshi Ishiguro, Makoto Nojima