Patents by Inventor Tsunehisa Sekiguchi

Tsunehisa Sekiguchi 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).

  • Die-lateral extruding method and apparatus
    Patent number: 5475999
    Abstract: An axially non-symmetric article is forged by the first upsetting by means of the first and second punches and by the second die-lateral extruding of a metal bar stock which is extruded via an orifice into an extension space(s) which has a greater cross section than the orifice.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: December 19, 1995
    Assignees: The Japan Steel Works, Ltd., Nippon Bulge Industries, Ltd., Showa Denko K.K.
    Inventors: Tsunehisa Sekiguchi, Kenji Iwata, Shigeyuki Koide