Ming-Hua Du

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Qinhuangdao, CN

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Patents Grantslast 30 patents

Information Patent Grant
Circuit board with high reflectivity and method for manufacturing t...
- Patent number 11,246,225
- Issue date Feb 8, 2022
- QING DING PRECISION ELECTRONICS (HUAIAN) CO., LTD
- Wen-Qiang Chen
- F21 - LIGHTING
Information Patent Grant
Waterproof circuit board and method for manufacturing the same
- Patent number 10,681,824
- Issue date Jun 9, 2020
- HongQiSheng Precision Electronics (QinHuangDao) Co., Ltd.
- Jian-Yi Hao
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Transparent flexible printed circuit board and method for manufactu...
- Patent number 9,860,977
- Issue date Jan 2, 2018
- HongQiSheng Precision Electronics (QinHuangDao) Co., Ltd.
- Cheng-Jia Li
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
CIRCUIT BOARD WITH HIGH REFLECTIVITY AND METHOD FOR MANUFACTURING T...
- Publication number 20210392757
- Publication date Dec 16, 2021
- QING DING PRECISION ELECTRONICS (HUAIAN) CO.,LTD
- WEN-QIANG CHEN
- F21 - LIGHTING