Patents by Inventor Katsuji Nishibata

Katsuji Nishibata 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 enriching apparatus
    Patent number: 4789388
    Abstract: An apparatus for producing oxygen enriched air from the atmospheric air, including an oxygen enriching system employing a fan for inducing a flow of atmospheric air through an oxygen enriching unit and a pump for deriving the oxygen enriched air from the oxygen enriching unit, a sound-proof box for encasing the fan and pump, an air intake passage having not less than five bends and an air exhaust passage also having not less than five bends. The oxygen enriching unit is provided with a unit for adjusting an oxygen concentration to a constant level regardless of any change in the atmospheric temperature.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: December 6, 1988
    Assignee: Teijin Limited
    Inventors: Katsuji Nishibata, Hiroshi Takano, Masaru Itai, Tsugutaka Shimote