Patents by Inventor Narajiro Shibata

Narajiro Shibata 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).

  • Process for making a radial tire
    Patent number: 4152186
    Abstract: Process for making a radial tire wherein a breaker ply layer and a tread layer are successively secured on the upper part of a first step assembly. The first step assembly consists of a carcass ply layer, bead portions and side wall rubbers. The tread layer is a composite form having a tread rubber, a pair of joint rubbers and a cushion rubber. Uneven surfaces are formed circumferentially containing therein the joint portions joint of the Joint rubbers and the side wall rubbers.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: May 1, 1979
    Assignee: The Toyo Rubber Industry Co., Ltd.
    Inventor: Narajiro Shibata