Patents by Inventor Katsuyuki Ezuka

Katsuyuki Ezuka 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).

  • Air cleaner
    Patent number: 6808547
    Abstract: An air cleaner comprises a filter element, for filtrating air, including a frame structure, a case provided with an opening through which the filter element is inserted into the case and having an abutment surface to which the seal portion of the filter element contacts, and a holder provided with a lid portion closing the opening of the case when fitted to the case. The filter element is first inserted into the case and the holder is thereafter fitted into the case so as to contact the seal portion of the filter element to the abutment surface of the case.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: October 26, 2004
    Assignee: Toyo Roki Seizo Kabushiki Kaisha
    Inventors: Hiromi Ota, Katsuyuki Ezuka
  • Air cleaner
    Publication number: 20040020177
    Abstract: An air cleaner comprises a filter element, for filtrating air, including a frame structure, a case provided with an opening through which the filter element is inserted into the case and having an abutment surface to which the seal portion of the filter element contacts, and a holder provided with a lid portion closing the opening of the case when fitted to the case. The filter element is first inserted into the case and the holder is thereafter fitted into the case so as to contact the seal portion of the filter element to the abutment surface of the case.
    Type: Application
    Filed: November 21, 2002
    Publication date: February 5, 2004
    Applicant: TOYO ROKI SEIZO KABUSHIKI KAISHA
    Inventors: Hiromi Ota, Katsuyuki Ezuka