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Ryozo Shiroishi

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  • Yokohama-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Metallic worked articles
    • Patent number 11,745,245
    • Issue date Sep 5, 2023
    • Toyo Seikan Group Holdings, Ltd.
    • Takuho Kumagai
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Aluminum can
    • Patent number 11,338,954
    • Issue date May 24, 2022
    • Toyo Seikan Co., Ltd.
    • Norihisa Hirota
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Mold and method for manufacturing drawn can
    • Patent number 11,267,033
    • Issue date Mar 8, 2022
    • Toyo Seikan Group Holdings, Ltd.
    • Ryozo Shiroishi
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Diamond surface polishing method and apparatus for implementing same
    • Patent number 10,155,293
    • Issue date Dec 18, 2018
    • Toyo Seikan Group Holdings, Ltd.
    • Masahiro Shimamura
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Method of polishing the diamond-surface
    • Patent number 9,149,901
    • Issue date Oct 6, 2015
    • Toyo Seikan Group Holdings, Ltd.
    • Ryozo Shiroishi
    • B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

  • Information Patent Application

    MACHINING JIG, MACHINING METHOD, AND METHOD OF MANUFACTURING SEAMLE...
    • Publication number 20230286032
    • Publication date Sep 14, 2023
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo SHIROISHI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    METHOD FOR MANUFACTURING BOTTOMED CYLINDRICAL BODY
    • Publication number 20230119966
    • Publication date Apr 20, 2023
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo SHIROISHI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    METHOD FOR MANUFACTURING BOTTOMED CYLINDRICAL BODY
    • Publication number 20230122197
    • Publication date Apr 20, 2023
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo SHIROISHI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    ALUMINUM CAN
    • Publication number 20220234780
    • Publication date Jul 28, 2022
    • Toyo Seikan Co., Ltd.
    • Norihisa HIROTA
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    PRESSING DIE AND PRESS WORKING METHOD
    • Publication number 20210394248
    • Publication date Dec 23, 2021
    • TOYO SEIKAN GROUP HOLDONGS, LTD.
    • Takuho KUMAGAI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    MACHINING JIG, MACHINING METHOD, AND METHOD OF MANUFACTURING SEAMLE...
    • Publication number 20210354191
    • Publication date Nov 18, 2021
    • TOYO SEIKAN GROUP HOLDONGS, LTD.
    • Ryozo SHIROISHI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    JIG FOR METAL PLASTIC WORKING
    • Publication number 20210354186
    • Publication date Nov 18, 2021
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Takuho KUMAGAI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    DIE FOR IRONING WORKING AND DIE MODULE
    • Publication number 20210069767
    • Publication date Mar 11, 2021
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Takuho Kumagai
    • C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
  • Information Patent Application

    METALLIC WORKED ARTICLES
    • Publication number 20210023603
    • Publication date Jan 28, 2021
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Takuho KUMAGAI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    ALUMINUM CAN
    • Publication number 20200071017
    • Publication date Mar 5, 2020
    • Toyo Seikan Co., Ltd.
    • Norihisa HIROTA
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Application

    METHOD OF FORMING GROOVES OF A FINE PERIODIC STRUCTURE IN THE SURFA...
    • Publication number 20200055147
    • Publication date Feb 20, 2020
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo SHIROISHI
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    MOLD AND METHOD FOR MANUFACTURING DRAWN CAN
    • Publication number 20180318900
    • Publication date Nov 8, 2018
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo SHIROISHI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    DIE FOR IRONING WORKING AND DIE MODULE
    • Publication number 20180229287
    • Publication date Aug 16, 2018
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Takuho KUMAGAI
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Application

    DIAMOND SURFACE POLISHING METHOD AND APPARATUS FOR IMPLEMENTING SAME
    • Publication number 20180021912
    • Publication date Jan 25, 2018
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Masahiro Shimamura
    • B24 - GRINDING POLISHING
  • Information Patent Application

    POLISHING DEVICE
    • Publication number 20170106494
    • Publication date Apr 20, 2017
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo Shiroishi
    • B24 - GRINDING POLISHING
  • Information Patent Application

    METHOD OF POLISHING THE DIAMOND-SURFACE
    • Publication number 20130252515
    • Publication date Sep 26, 2013
    • TOYO SEIKAN GROUP HOLDINGS, LTD.
    • Ryozo Shiroishi
    • B24 - GRINDING POLISHING