Patents by Inventor Toshifumi Iizuka

Toshifumi Iizuka 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).

  • Metal plate and method of shaping the same
    Patent number: 6733899
    Abstract: There are provided a step of forming a structure in which a first concave portion is formed in a predetermined portion on one surface of a metal plate and also a convex portion that protrudes from other surface of the metal plate is formed by formation of the first concave portion and a second concave portion is formed in a predetermined portion on an outside of a peripheral portion of the convex portion, by shaping the metal plate by means of stamping using a die, and a step of cutting the convex portion formed on the other surface of the metal plate.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: May 11, 2004
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Sumio Uehara, Yoshihisa Nagamine, Toshifumi Iizuka
  • Metal plate and method of shaping the same
    Publication number: 20030157359
    Abstract: There are provided a step of forming a structure in which a first concave portion is formed in a predetermined portion on one surface of a metal plate and also a convex portion that protrudes from other surface of the metal plate is formed by formation of the first concave portion and a second concave portion is formed in a predetermined portion on an outside of a peripheral portion of the convex portion, by shaping the metal plate by means of stamping using a die, and a step of cutting the convex portion formed on the other surface of the metal plate.
    Type: Application
    Filed: February 14, 2003
    Publication date: August 21, 2003
    Applicant: SHINKO ELECTRIC INDUSTRIES CO., LTD.
    Inventors: Sumio Uehara, Yoshihisa Nagamine, Toshifumi Iizuka