Patents by Inventor Toshio Ohsugi

Toshio Ohsugi 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).

  • Charge and discharge protection circuit and battery pack with high withstand voltage
    Patent number: 5936384
    Abstract: In a charge and discharge protection circuit, those transistors constituting a level shifting circuit that may receive a relatively high voltage as a source level or a drain level have a high withstand voltage construction.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: August 10, 1999
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiko Fujiwara, Toshio Ohsugi