Patents by Inventor Toshio Shibabuti

Toshio Shibabuti 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 of hot tapping type branching and split joint used therein
    Patent number: 4719936
    Abstract: The disclosed invention provides a novel method of perforating a main pipeline while in service, and split joints suited to this method, in order to connect a branch pipeline thereto. According to this method, perforating work is carried out from an opposite side across the main pipeline to where the branch pipeline is connected, as distinct from known methods in which perforating work is carried out on the side of the main pipeline to which a branch pipeline is connected.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: January 19, 1988
    Assignee: Osaka Gas Company Limited
    Inventors: Toshihiro Tsubakimoto, Koziro Hori, Toshio Shibabuti