Patents by Inventor Youichi Sonobe

Youichi Sonobe 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).

  • Image forming method and apparatus therefor
    Patent number: 6491365
    Abstract: An image forming apparatus prevents foreign matter, such as dust or the like, from being sucked into an ink passage from an ejection opening when a liquid ejection head ejecting a liquid is elevated from an image forming position to a recovery process position located above the image forming position.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: December 10, 2002
    Assignee: Canon Aptex
    Inventor: Youichi Sonobe
  • IMAGE FORMING METHOD AND APPARATUS THEREFOR
    Publication number: 20020113836
    Abstract: An image forming apparatus prevents foreign matter, such as dust or the like from being sucked into an ink passage from an ejection opening when a liquid ejection head ejecting a liquid is elevated from an image forming position to a recovery process position located above the image forming position.
    Type: Application
    Filed: June 8, 1998
    Publication date: August 22, 2002
    Inventor: YOUICHI SONOBE