Patents by Inventor Tatsuya Utsumi

Tatsuya Utsumi 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).

  • Shredding machine
    Patent number: 5016828
    Abstract: A shredding machine has a rotary cutter and a fixed cutter. The rotary cutter includes a cutter part with a spiral cutting edge and a flute, and a column part for rotatably holding by a holding member for rotation of the rotary cutter. The fixed cutter has a cutting edge contacting with the cutter part of the rotary cutter. In rotating the rotary cutter, longitudinal slips of documents are fed between the cutters so that the documents enter the flute of the rotary cutter to cut the slips into chips by cooperation between the cutting edge of the rotary cutter and the cutting edge of the fixed cutter.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: May 21, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tatsuya Utsumi, Shinji Kawamura, Tetsuya Itoh, Hiroshi Moriyama, Naofumi Okada