Patents by Inventor Takayoshi Matsui

Takayoshi Matsui 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).

  • Patent number: 6679954
    Abstract: The present invention makes the best use of a low-cost chemical composition in providing a high strength and high corrosion resistance stainless steel, which has improved delayed fracture resistance and toughness in particular, for building and construction uses, and as, for example, a stainless steel tapping screw. The present invention is, specifically, a stainless steel and a stainless steel screw with high strength and high toughness and excellent in delayed fracture resistance, characterized by: comprising, by mass, 0.01 to 0.25% of C, 0.05 to 1.0% of Si, 0.1 to 2.0% of Mn, 0.1 to 3.0% of Ni, 11.0 to 16.0% of Cr, 0.01 to 0.15% of N, and 0.01 to 3.0% of Mo; containing, optionally, 0.001 to 0.005% of B and/or one or more of 0.05 to 0.5% of Ti, 0.05 to 0.5% of Nb, and 0.05 to 0.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: January 20, 2004
    Assignee: Nippon Steel Corporation
    Inventors: Koji Takano, Takayoshi Matsui, Koichi Yoshimura
  • Patent number: 5433798
    Abstract: High strength martensitic stainless steel having high rusting resistance which comprises, by weight, 0.13 to 0.20% of C, 0.5 or less of Si, 2.0% or less of Mn, 1.0 to 2.5% of Ni, 12.0 to 16.0% of Cr, 1.3 to 3.5% of Mo, 0.06 to 0.13% of N, if necessary, 0.001 to 0.010% of B, or 0.05 to 1.0% of Ti, 0.05 to 1.0% of Nb, which satisfies 16 to 21% of ARI value for a rusting resistance index (Formula (1)), less than 0% of DI value for a .delta.-ferrite content index (Formula (2)), less than 0% of MI value for martensite content index (Formula (3)), less than 260% of W.sub.1 or W.sub.2 value for a cold workability index (Formulas (4) or (5)), with the balance comprising substantially Fe and inevitable impurities, said steel being characterized in that the martensite structure or the tempered martensite structure is contained, in which a Cr carbide of 0.2 .mu.
    Type: Grant
    Filed: January 11, 1994
    Date of Patent: July 18, 1995
    Assignee: Nippon Steel Corporation
    Inventors: Koji Takano, Mizuo Sakakibara, Satoshi Araki, Takayoshi Matsui, Wataru Murata, Koichi Yoshimura
  • Patent number: D641050
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: July 5, 2011
    Assignee: Nintendo Co., Ltd.
    Inventors: Takayoshi Matsui, Hideaki Kamata
  • Patent number: D673961
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: January 8, 2013
    Assignee: Nintendo Co., Ltd.
    Inventors: Takayoshi Matsui, Kazuhiko Koriyama
  • Patent number: D692437
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: October 29, 2013
    Assignee: Nintendo Co., Ltd.
    Inventors: Kenichi Sugino, Yui Ehara, Takaki Fujino, Yuko Zenri, Junichiro Miyatake, Takayoshi Matsui, Tetsuya Akama, Kochi Kawai, Kazuhiko Koriyama
  • Patent number: D697139
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: January 7, 2014
    Assignee: Nintendo Co., Ltd.
    Inventors: Kenichi Sugino, Yui Ehara, Takaki Fujino, Junichiro Miyatake, Yuko Zenri, Takayoshi Matsui, Tetsuya Akama, Hironori Akai, Munetaka Nishikawa, Hiroki Goto, Kochi Kawai, Kumpei Fujita
  • Patent number: D697142
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: January 7, 2014
    Assignee: Nintendo Co., Ltd.
    Inventors: Kenichi Sugino, Yui Ehara, Takaki Fujino, Junichiro Miyatake, Yuko Zenri, Takayoshi Matsui, Tetsuya Akama, Hironori Akai, Munetaka Nishikawa, Hiroki Goto, Kochi Kawai, Kumpei Fujita
  • Patent number: D697143
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: January 7, 2014
    Assignee: Nintendo Co., Ltd.
    Inventors: Kenichi Sugino, Yui Ehara, Takaki Fujino, Junichiro Miyatake, Yuko Zenri, Takayoshi Matsui, Tetsuya Akama, Hironori Akai, Munetaka Nishikawa, Hiroki Goto, Kochi Kawai, Kumpei Fujita
  • Patent number: D706356
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: June 3, 2014
    Assignee: Nintendo Co., Ltd.
    Inventors: Kenichi Sugino, Yui Ehara, Takaki Fujino, Junichiro Miyatake, Yuko Zenri, Takayoshi Matsui, Tetsuya Akama, Hironori Akai, Munetaka Nishikawa, Hiroki Goto, Kochi Kawai, Kumpei Fujita