Naoya Shirasawa

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Chiyoda-ku, Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Piercer plug and method of manufacturing the same
- Patent number 11,214,855
- Issue date Jan 4, 2022
- Nippon Steel Corporation
- Yasuyoshi Hidaka
- C21 - METALLURGY OF IRON
Information Patent Grant
Method of manufacturing piercer plug
- Patent number 10,888,906
- Issue date Jan 12, 2021
- Nippon Steel & Sumitomo Metal Corporation
- Yasuyoshi Hidaka
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
SEAMLESS STEEL PIPE SUITABLE FOR USE IN SOUR ENVIRONMENT
- Publication number 20220186350
- Publication date Jun 16, 2022
- NIPPON STEEL CORPORATION
- Seiya OKADA
- C21 - METALLURGY OF IRON
Information Patent Application
PIERCER PLUG
- Publication number 20210101194
- Publication date Apr 8, 2021
- NIPPON STEEL CORPORATION
- Yasuyoshi HIDAKA
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Piercer Plug and Method of Manufacturing the Same
- Publication number 20200263282
- Publication date Aug 20, 2020
- NIPPON STEEL CORPORATION
- Yasuyoshi Hidaka
- C21 - METALLURGY OF IRON
Information Patent Application
Method of Manufacturing Piercer Plug
- Publication number 20190151917
- Publication date May 23, 2019
- NIPPON STEEL & SUMITOMO METAL CORPORATION
- Yasuyoshi Hidaka
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...