Patents by Inventor Yoshito Miyasaka

Yoshito Miyasaka 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: 6899265
    Abstract: Disclosed is a novel electric joining method and apparatus that can overcome the defects associated with the prior art while taking advantage of the technology for the pulse excited sintering process such as spark plasma sintering process or the hot-press joining process.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: May 31, 2005
    Assignees: Sumitomo Coal Mining Co., Ltd., Suwanetsu Kogyo Co., Ltd.
    Inventors: Yoshito Miyasaka, Masao Tokita, Hitoshi Karasawa, Fumitake Nishiyama
  • Publication number: 20030106877
    Abstract: Disclosed is a novel electric joining method and apparatus that can overcome the defects associated with the prior art while taking advantage of the technology for the pulse excited sintering process such as spark plasma sintering process or the hot-press joining process.
    Type: Application
    Filed: January 16, 2003
    Publication date: June 12, 2003
    Applicant: SUMITOMO COAL MINING CO., LTD.
    Inventors: Yoshito Miyasaka, Masao Tokita, Hitoshi Karasawa, Fumitake Nishiyama
  • Patent number: 6515250
    Abstract: Disclosed is a novel electric joining method and apparatus that can overcome the defects associated with the prior art while taking advantage of the technology for the pulse excited sintering process such as spark plasma sintering process or the hot-press joining process.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: February 4, 2003
    Assignees: Sumitomo Coal Mining Co., Ltd., Suwanetsu Kogyo Co., Ltd.
    Inventors: Yoshito Miyasaka, Masao Tokita, Hitoshi Karasawa, Fumitake Nishiyama
  • Patent number: 6478498
    Abstract: To provide a ball for a ball-point pen and to provide a ball-point pen with the use of it which are superior in abrasion resistance and lubricating ability and can be manufactured easily. A ball 2 for a ball-point pen is made of a material of stainless steel whose surface is formed with a nitrosulphurized layer, or a ball 2 for a ball-point pen is made of a material of aluminum chrome molybdenum steel whose surface is formed with a nitrosulphurized layer. A ball-point pen utilizing such a ball has superior writing qualities.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: November 12, 2002
    Inventors: Yoshito Miyasaka, Hitoshi Karasawa
  • Publication number: 20020011468
    Abstract: Disclosed is a novel electric joining method and apparatus that can overcome the defects associated with the prior art while taking advantage of the technology for the pulse excited sintering process such as spark plasma sintering process or the hot-press joining process.
    Type: Application
    Filed: June 4, 2001
    Publication date: January 31, 2002
    Applicant: SUMITOMO COAL MINING CO., LTD.
    Inventors: Yoshito Miyasaka, Masao Tokita, Hitoshi Karasawa, Fumitake Nishiyama