Patents by Inventor Hidekazu MASUO

Hidekazu MASUO 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).

  • Polishing sheet, polishing tool and polishing method
    Patent number: 10105814
    Abstract: A polishing sheet includes a sheet including one side having a surface, a plurality of convex portions provided to project from the surface of the one side of the sheet, a plurality of first abrasive grains provided on an upper surface of each of the convex portions, and a plurality of second abrasive grains provided on the surface of the sheet. The second abrasive grains each have hardness higher than that of the first abrasive grains.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: October 23, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kiyotaka Sawada, Jun Zhang, Hidekazu Masuo, Wataru Kikuta, Tatsuya Tanaka, Tomihiro Takahashi, Tsuyoshi Hashiyada, Yutaro Hoshino, Kyohta Koetsuka
  • POLISHING SHEET, POLISHING TOOL AND POLISHING METHOD
    Publication number: 20160221147
    Abstract: A polishing sheet includes a sheet including one side having a surface, a plurality of convex portions provided to project from the surface of the one side of the sheet, a plurality of first abrasive grains provided on an upper surface of each of the convex portions, and a plurality of second abrasive grains provided on the surface of the sheet. The second abrasive grains each have hardness higher than that of the first abrasive grains.
    Type: Application
    Filed: January 27, 2016
    Publication date: August 4, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Kiyotaka SAWADA, Jun ZHANG, Hidekazu MASUO, Wataru KIKUTA, Tatsuya TANAKA, Tomihiro TAKAHASHI, Tsuyoshi HASHIYADA, Yutaro HOSHINO, Kyohta KOETSUKA