Patents by Inventor Keizoh Itoh

Keizoh Itoh 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).

  • Cleaning device for copying machines
    Patent number: 4610534
    Abstract: A cleaning device for an electrophotographic copying machine collects residual toner from the photoconductive surface of a copying machine by using a rotary brush and deposits the collected toner in a specific part such as a filter via vacuum means, wherein it typically includes an air duct formed between a specific part and the rotary brush and a vacuum-activating fan mounted in a proper position inside the air duct.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: September 9, 1986
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Fukusaburo Ito, Hiroshi Kataoka, Keizoh Itoh