Patents by Inventor Kazuyuki Akiya

Kazuyuki Akiya 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).

  • Sewage treatment apparatus
    Patent number: 6881332
    Abstract: In the present invention, solid contents 38, which are collected by a solid-liquid separation device 33 in a solid-liquid separation tank 14 and charged into a decomposing treatment tank 11, are decomposed to water and CO2 by the action of aerobic microbes and the air (oxygen) supplied from a lower aeration tank 12 and substantially disappear. The oil contents contained in the water having been decomposed is removed by an oil-water separation tank 13.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: April 19, 2005
    Assignee: Earthclean Co., Ltd.
    Inventors: Hiroshi Ogawa, Kazuyuki Akiya