Patents by Inventor Takehiro Kitsuda

Takehiro Kitsuda 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 and apparatus for punching a thin metal tape to provide a lead frame for a semiconductor device
    Patent number: 5979277
    Abstract: A stripper holder for holding a stripper plate conforms with the deformation of a die plate. A pressing force applied to the stripper plate and is greater than an elastic limit of a metal tape to be punched, and less than a pressing deformation or breakage force of the metal tape. The stripper holder may also be flexible, or such that the metal tape is pressed at two different positions for one punching position by two different pressing forces.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: November 9, 1999
    Assignee: Hitachi Cable, Ltd.
    Inventors: Takehiro Kitsuda, Hiroshi Fujikawa, Keiichi Sato, Makoto Someno