Patents by Inventor Hajime Mushika

Hajime Mushika 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).

  • Method for preparing perforated film
    Patent number: 4978486
    Abstract: A method for preparing a perforated film, for use in the field of sanitary, food packaging and industrial materials, by thermally embossing an oriented polyolefin film with an embossing roll having a large number of protruding knobs and a pinch roll which presses the film against the knobs, and simultaneously taking up the resultant film at a rate not less than the processing speed of the embossing roll.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: December 18, 1990
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Michiyasu Ito, Toshiyuki Ishii, Shuji Matumura, Hajime Mushika, Tomohide Tanaka