Patents by Inventor Norinobu Sakamoto

Norinobu Sakamoto 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).

  • Current detector for detecting battery charge remaining
    Patent number: 5623210
    Abstract: A current-voltage convertor 32 respectively generates positive and negative voltages Xa when a battery 20 is being charged and discharged. A voltage synthesizer 34 adds a prescribed positive voltage to the voltage Xa, and always generates a positive sample voltage Xs. This sample voltage Xs and prescribed reference voltages X1, X2 are compared by means of two differential amplifiers 40, 42 to obtain signals V1, V2 for the currents being charged and discharged. Then, these signals are supplied to a microcomputer 44.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: April 22, 1997
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Norinobu Sakamoto