Patents by Inventor Norihasa Yamamoto

Norihasa Yamamoto 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).

  • Dust filter
    Patent number: 7981180
    Abstract: A dust filter of an evaporated fuel treatment device is taught that preferably include a filtration member for filtering air introduced to an atmosphere introduction path, and a casing receiving the filtration member therein. The dust filter being disposed on the atmosphere introduction path of the evaporated fuel treatment device. The filtration member has an arcuate shape in cross section, and wherein the filtration member is arranged and structured such that air flows in a radial direction thereof, so as to be filtered.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: July 19, 2011
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Norihasa Yamamoto, Takashi Kato, Masahiro Sugiura
  • Dust filter
    Patent number: 7942947
    Abstract: A dust filter of an evaporated fuel treatment device is taught that preferably include a filtration member for filtering air introduced to an atmosphere introduction path, and a casing receiving the filtration member therein. The dust filter being disposed on the atmosphere introduction path of the evaporated fuel treatment device. The filtration member has an arcuate shape in cross section, and wherein the filtration member is arranged and structured such that air flows in a radial direction thereof, so as to be filtered.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: May 17, 2011
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Norihasa Yamamoto, Takashi Kato, Masahiro Sugiura