Patents by Inventor Michio Kousaka

Michio Kousaka 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).

  • Stopper assembly for medical liquid container and method and apparatus for manufacturing the same
    Patent number: 4512486
    Abstract: A stopper assembly for a medical liquid container comprises an inner cylindrical stopper member formed of a plastic material, a rubber plug member hermetically contained in a chamber formed within the inner stopper member by first and second partition walls. An outer cylindrical stopper member formed of a plastic material is hermetically welded around the inner stopper member. An annular score is formed in the first partition wall with a pulling member being formed at a region enclosed by the annular score. A flange is formed at the base portion of the stopper assembly at which the stopper assembly is joined to a mouth of the medical liquid container. Further disclosed are method and apparatus for manufacturing the stopper assembly.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: April 23, 1985
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Hiroshi Kobayashi, Michio Kousaka