Patents by Inventor Isao Tokumaru

Isao Tokumaru 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).

  • Sheet stacker
    Patent number: 4667953
    Abstract: A sheet stacker for a corrugation machine having a cutter to widthwisely cut off a continuously manufactured corrugated cardboard web into corrugated cardboard sheets, and then transfer, stack and eject the sheets.
    Type: Grant
    Filed: August 26, 1985
    Date of Patent: May 26, 1987
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Tadashi Hirakawa, Masashi Waseda, Toshiaki Kusubayashi, Isao Tokumaru