Patents by Inventor Yasufumi Yamaguchi

Yasufumi Yamaguchi 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).

  • Transformable metal surface hardening method
    Patent number: 8286455
    Abstract: A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressure without the occurrence of melt loss, quench crack, soft spot, deformation, etc. to thereby reform the structure of surface interior of material as hardening treatment object into a miniaturized martensitic structure.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: October 16, 2012
    Assignees: Osaka University, Kimura Chuosho Co., Ltd.
    Inventors: Hidetoshi Fujii, Yasufumi Yamaguchi, Toshitake Kanno, Yoya Fukuda
  • TRANSFORMABLE METAL SURFACE HARDENING METHOD
    Publication number: 20090056404
    Abstract: A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressure without the occurrence of melt loss, quench crack, soft spot, deformation, etc. to thereby reform the structure of surface interior of material as hardening treatment object into a miniaturized martensitic structure.
    Type: Application
    Filed: January 15, 2007
    Publication date: March 5, 2009
    Applicants: OSAKA UNIVERSITY, KIMURA CHUZOSHO CO., LTD.
    Inventors: Hidetoshi Fujii, Yasufumi Yamaguchi, Toshitake Kanno, Yoya Fukuda