Patents by Inventor Yasunori Aikawa

Yasunori Aikawa 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).

  • Battery state monitoring circuit
    Patent number: 6771048
    Abstract: A battery apparatus having a long duration (use time period) in which when a voltage of secondary batteries is a hysteresis voltage, in response to a charge inhibition signal outputted from a microcomputer and exhibiting that the secondary batteries should be in a charge inhibition state, a signal used to restrict charge of the secondary batteries is outputted to a charge control terminal and also a signal having information of the charge inhibition state is outputted to a secondary battery controlling circuit to suppress the output of a hysteresis voltage signal from the secondary battery controlling circuit.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: August 3, 2004
    Assignee: Seiko Instruments Inc.
    Inventors: Yasunori Aikawa, Atsushi Sakurai
  • Battery state monitoring circuit
    Publication number: 20030169050
    Abstract: A battery apparatus having a long duration (use time period) in which when a voltage of secondary batteries is a hysteresis voltage, in response to a charge inhibition signal outputted from a microcomputer and exhibiting that the secondary batteries should be in a charge inhibition state, a signal used to restrict charge of the secondary batteries is outputted to a charge control terminal and also a signal having information of the charge inhibition state is outputted to a secondary battery controlling circuit to suppress the output of a hysteresis voltage signal from the secondary battery controlling circuit.
    Type: Application
    Filed: February 20, 2003
    Publication date: September 11, 2003
    Inventors: Yasunori Aikawa, Atsushi Sakurai