Patents by Inventor Kenji Sumiyoshi

Kenji Sumiyoshi 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).

  • Original document size detecting arrangement
    Patent number: 4614874
    Abstract: An arrangement for detecting sizes of original documents for use in a copying apparatus or the like, which is capable of effecting size detection at high reliability irrespective of thicknesses of original documents, and in which an adverse effect due to cross-talk light by neighboring light emitting elements employed in it is eliminated for detection of various sizes based on presence of correct original documents.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: September 30, 1986
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroaki Fukuda, Kenji Sumiyoshi, Ryoichi Masaki, Zempei Tani