Patents by Inventor Ken Hirate

Ken Hirate 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).

  • Apparatus for purifying contaminated air
    Patent number: 5643795
    Abstract: An apparatus for purifying contaminated air has an air inlet exposed to a road surface, an air outlet spaced from the road surface, a soil bed for being populated with microorganisms, the soil bed being disposed between the air inlet and the air outlet and allowing air to pass therethrough, a pipe interconnecting the soil bed and the air outlet, and embedded underground, and a fan for introducing air from the air inlet, passing the air through the soil bed, delivering the air from the soil bed through the pipe to the air outlet, and discharging the air from the air outlet.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: July 1, 1997
    Assignee: Fujita Corporation
    Inventors: Ken Hirate, Kazumi Kaneko, Shinichiro Sato, Kazunori Watagami