Patents by Inventor Tsutomu Noguti

Tsutomu Noguti 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).

  • Lead frame flash removing method and apparatus
    Patent number: 5956574
    Abstract: In a lead frame flash removing method and apparatus, a lead frame is molded integrally with a case. After molding, abrasive agent-mixed water is sprayed to a surface of the lead frame where a flash is formed. The lead frame is dipped in an electrolytic solution and applying a DC voltage is applied across the lead frame and an electrode in the electrolytic solution, thereby electrolytically processing the lead frame. After the electrolytic process, an external force is applied to the surface of the lead frame, thereby removing the flash.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: September 21, 1999
    Assignee: NEC Corporation
    Inventors: Seiji Ichikawa, Junichi Tanaka, Tomoaki Hirokawa, Taku Sato, Tomoaki Kimura, Satoshi Murata, Tsutomu Kubota, Takeo Ogihara, Kenji Uchida, Kenji Watanabe, Tsutomu Noguti