Patents by Inventor Yasufumi Fukao

Yasufumi Fukao 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).

  • Oxygen concentration monitor using galvanic cell type oxygen sensor
    Patent number: 4914424
    Abstract: The invention discloses an oxygen concentration monitor using a Galvanic cell type oxygen sensor. An automatic calibration circuit always calibrates the maximum output of the sensor as the value corresponding to an oxygen concentration of 21%, based on the fact that the oxygen concentration in a fresh air never exceeds 21%.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: April 3, 1990
    Assignee: Japan Storage Battery Company, Limited
    Inventors: Atsushi Hirao, Yasufumi Fukao