Patents by Inventor Hirofumi Kojima

Hirofumi Kojima 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).

  • Publication number: 20210390560
    Abstract: An information processing apparatus acquires a code including first data for identifying a consumer and second data for specifying information to be provided for a purchase action. The information processing apparatus acquires the first data and the second data from the acquired code. The information processing apparatus provides the information specified by the second data acquired together with the first data to the consumer identified by the acquired first data.
    Type: Application
    Filed: January 15, 2021
    Publication date: December 16, 2021
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Hirofumi KOJIMA, Yuusuke KAWAIDA
  • Patent number: 8215842
    Abstract: A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: July 10, 2012
    Assignee: Nidec Corporation
    Inventors: Tetsuya Maruyama, Makoto Kutsukake, Hirofumi Kojima, Michihiro Ito, Masayoshi Saichi
  • Patent number: 8169738
    Abstract: A fluid dynamic bearing mechanism includes a stationary bearing portion including a sleeve portion, and a rotating bearing portion including an outer rotating portion. A lubricating oil is arranged between the stationary and rotating bearing portions. A first dynamic pressure groove array is arranged in an upper surface of the sleeve portion or a lower surface of the outer rotating portion. A second dynamic pressure groove array is arranged in a surface of the outer rotating portion or a surface of the stationary bearing portion in a region between the first array and a liquid surface. An end of the second array closer to the liquid surface is arranged radially inward of an opposite end of the second array. An upper end opening of a communicating channel defined in the sleeve portion is arranged radially outward of a radially inner end of the first array.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: May 1, 2012
    Assignee: Nidec Corporation
    Inventors: Atsushi Yawata, Yoichi Sekii, Junya Mizukami, Tetsuya Maruyama, Hirofumi Kojima
  • Publication number: 20120092788
    Abstract: A fluid dynamic bearing mechanism includes a stationary bearing portion including a sleeve portion, and a rotating bearing portion including an outer rotating portion. A lubricating oil is arranged between the stationary and rotating bearing portions. A first dynamic pressure groove array is arranged in an upper surface of the sleeve portion or a lower surface of the outer rotating portion. A second dynamic pressure groove array is arranged in a surface of the outer rotating portion or a surface of the stationary bearing portion in a region between the first array and a liquid surface. An end of the second array closer to the liquid surface is arranged radially inward of an opposite end of the second array. An upper end opening of a communicating channel defined in the sleeve portion is arranged radially outward of a radially inner end of the first array.
    Type: Application
    Filed: February 25, 2011
    Publication date: April 19, 2012
    Applicant: NIDEC CORPORATION
    Inventors: Atsushi YAWATA, Yoichi SEKII, Junya MIZUKAMI, Tetsuya MARUYAMA, Hirofumi KOJIMA
  • Publication number: 20090196540
    Abstract: A fluid dynamic pressure bearing includes a shaft arranged along a central axis, an annular member fixed to the shaft, a sleeve, a lubricant, and a lubricating film. A stepped surface is provided on the outer circumferential surface of the shaft. The annular member preferably includes a lower surface extending radially with respect to the central axis and arranged to make contact with the stepped surface in the inner edge portion of the lower surface. The sleeve preferably includes an upper surface axially opposed to the lower surface of the annular member. The lubricant is provided between the shaft and the sleeve and between the annular member and the sleeve. The lubricating film is provided on the lower surface of the annular member at least over a region lying radially outwardly of the inner edge portion of the lower surface.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 6, 2009
    Applicant: Nidec Corporation
    Inventors: Tetsuya MARUYAMA, Makoto KUTSUKAKE, Hirofumi KOJIMA, Michihiro ITO, Masayoshi SAICHI
  • Patent number: 5841157
    Abstract: A semiconductor integrated circuit device includes a high density cell in which a more densely integrated layout is provided by combining cells having the same circuit configuration and sharing a basic gate portion among each of the cells.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: November 24, 1998
    Assignees: Mitsubishi Electric Semiconductor Software Co., Ltd., Mitsubishi Denji Kabushiki Kaisha
    Inventors: Hirofumi Kojima, Yutaka Kamakura