Patents by Inventor Kyoichiro Nakayama

Kyoichiro Nakayama 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).

  • Cutting tool and method for making the same
    Patent number: 6035844
    Abstract: A cutting tool is provided which includes a steel metal body and a cemented carbide cutting tip secured to the metal body by a metallic layer. The metallic layer has a high-strength metallic portion and a high-toughness metallic portion. The high-strength metallic portion is made of a metal having a thermal expansion rate between a thermal expansion rate of the metal body and the thermal expansion rate of the cutting tip. The high-toughness metallic portion is located between edge portions of a securing region of the metal body and the cutting tip and has toughness larger than that of the high-strength metallic portion.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: March 14, 2000
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Ryuji Otani, Isao Fuwa, Masahiro Ikegami, Noboru Kusano, Toshikazu Hamada, Kyoichiro Nakayama