Patents by Inventor Isamu Sako

Isamu Sako 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).

  • Blow molded container and blow mold thereof
    Patent number: 5799809
    Abstract: A blow molded container of the present invention is a container formed by blow molding in which a single-layer or multi-layer parison comprising a cylindrical resin material is heated and inflated by air in a mold, wherein a bottom sealing portion formed by pinch offs of the mold has a projection projecting outwardly from the container and sunk portions formed in one of the resin layers constituting the projection such a manner as to be buried in the other resin layer.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: September 1, 1998
    Assignee: Yoshino Kogyosho Co., Ltd.
    Inventors: Isamu Sako, Masato Honda, Jyoji Sato, Masato Seguchi, Hiroyuki Hisama