HONGCHAO JI

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ZHAOQING CITY, CN

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Patents Grantslast 30 patents

Information Patent Grant
Precision forming method of high-efficiency and near-net hollow val...
- Patent number 10,279,440
- Issue date May 7, 2019
- HUAIJI DENGYUN AUTO-PARTS (HOLDING) CO., LTD.
- Jinping Liu
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
PRECISION FORMING METHOD OF HIGH-EFFICIENCY AND NEAR-NET HOLLOW VAL...
- Publication number 20180104776
- Publication date Apr 19, 2018
- Huaiji Dengyun Auto-Parts (Holding) Co., Ltd
- JINPING LIU
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR