Patents by Inventor Tovoaki Bada

Tovoaki Bada 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 for preventing brittle fracture of steel pipe structures
    Patent number: 4079224
    Abstract: A method of preventing brittle fracture of a pipe structure constructed by welding welded or continuous welded steel pipes, which comprise subjecting a certain length of the seamed portion adjacent to the butt welded portion of the steel pipe to an arc treatment.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: March 14, 1978
    Assignee: Nippon Steel Corporation
    Inventors: Hiroyo Haga, Tovoaki Bada, Sigeo Fujimori, Tuguro Kikuno, Hiroshi Nozaki