Yanfeng QI

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Shanghai, CN

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Patents Applicationslast 30 patents

Information Patent Application
PROCESS FOR SMELTING STEEL FOR ULTRAFINE CARBORUNDUM WIRE
- Publication number 20230175093
- Publication date Jun 8, 2023
- Baoshan Iron & Steel Co., Ltd
- Yingtie XU
- C21 - METALLURGY OF IRON
Information Patent Application
SPRING STEEL HAVING SUPERIOR FATIGUE LIFE, AND MANUFACTURING METHOD...
- Publication number 20210164078
- Publication date Jun 3, 2021
- Baoshan Iron & Steel Co., Ltd
- Zan YAO
- C21 - METALLURGY OF IRON