Patents by Inventor Eizaburo Ohya

Eizaburo Ohya 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).

  • Joint construction of pipeline
    Patent number: 4397486
    Abstract: An improved joint construction of a pipeline, which is provided with inclined bearing surfaces of fastening members, with respect to the centerline or axis of the pipeline, and arranged to improve the working efficiency in the coupling, ensure the working safety, and also decrease cost required for coupling tools.
    Type: Grant
    Filed: March 3, 1981
    Date of Patent: August 9, 1983
    Assignee: Toyo Kogyo Co., Ltd.
    Inventor: Eizaburo Ohya