Patents by Inventor Mituo Kono

Mituo Kono 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).

  • Tobacco smoke filter
    Patent number: 4583560
    Abstract: A tobacco smoke filter includes a corrugated tape-like wrapping which, together with an outer perforated or otherwise air-permeable paper, defines a set of longitudinal grooves. Each of the grooves includes a blocking member, so as to inhibit direct smoke flow through the grooves and promote a ventilation effect. The blocking members in each groove are longitudinally staggered from one groove to the next to simplify the production of the device.
    Type: Grant
    Filed: July 7, 1983
    Date of Patent: April 22, 1986
    Assignees: Mitsubishi Acetate Co., Ltd, Japan Tobacco Inc.
    Inventors: Takashi Sakai, Kazuo Maeda, Masuo Kawabata, Mituo Kono