Patents by Inventor Keisuke Matuso

Keisuke Matuso 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).

  • Ink tank with valve in ink supply port
    Patent number: 7559636
    Abstract: An ink tank capable of a stable ink supply to a print head uses a simple valve construction. In one preferred example, an ink path is closed by a lip portion of a valve rubber engaging a flange, and an angle formed by an inner surface of an opening in the lip portion and an engagement surface of the flange is an acute angle.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: July 14, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Kitabatake, Yasuo Kotaki, Keisuke Matuso, Toshihiko Ujita, Hiromasa Amma