Yannan MA

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SHANGHAI, CN

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Patents Applicationslast 30 patents

Information Patent Application
STEEL PIPE FOR OIL CYLINDER AND MANUFACTURING METHOD THEREFOR
- Publication number 20250012382
- Publication date Jan 9, 2025
- Baoshan Iron & Steel Co., Ltd
- Wen Sun
- C21 - METALLURGY OF IRON
Information Patent Application
HIGH-STRENGTH AND HIGH-TOUGHNESS BAINITE GEOLOGICAL DRILLING PIPE A...
- Publication number 20240229979
- Publication date Jul 11, 2024
- Baoshan Iron & Steel Co., Ltd
- Wen SUN
- C21 - METALLURGY OF IRON
Information Patent Application
HIGH-STRENGTH AND HIGH-TOUGHNESS BAINITE GEOLOGICAL DRILLING PIPE A...
- Publication number 20240133490
- Publication date Apr 25, 2024
- Baoshan Iron & Steel Co., Ltd
- Wen SUN
- C21 - METALLURGY OF IRON