Patents by Inventor Masanobu Narita

Masanobu Narita 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).

  • Method and system for monitoring state of lead acid battery
    Patent number: 6838883
    Abstract: In order to monitor a state of a battery, a threshold value of an internal impedance of the battery is first determined. It is prepared an approximate expression indicating a correlation between a residual capacity of the battery and an internal impedance of the battery which is greater than the threshold value. The internal impedance of the battery is then measured. When the measured internal impedance is the threshold value or less, the residual capacity is determined as an initial value. When the measured internal impedance is greater than the threshold value, the residual capacity is monitored with the approximate expression.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: January 4, 2005
    Assignee: The Furukawa Battery Co., Ltd.
    Inventors: Tetsuya Kanou, Yuichi Watakabe, Koji Miyata, Kiyoshi Takahashi, Masanobu Narita
  • Method and system for monitoring state of lead acid battery
    Publication number: 20040085072
    Abstract: In order to monitor a state of a battery, a threshold value of an internal impedance of the battery is first determined. It is prepared an approximate expression indicating a correlation between a residual capacity of the battery and an internal impedance of the battery which is greater than the threshold value. The internal impedance of the battery is then measured. When the measured internal impedance is the threshold value or less, the residual capacity is determined as an initial value. When the measured internal impedance is greater than the threshold value, the residual capacity is monitored with the approximate expression.
    Type: Application
    Filed: November 5, 2002
    Publication date: May 6, 2004
    Applicant: THE FURUKAWA BATTERY CO., LTD.
    Inventors: Tetsuya Kanou, Yuichi Watakabe, Koji Miyata, Kiyoshi Takahashi, Masanobu Narita