Xiaoqiu ZHANG

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Wenzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Sealing tightness testing device
- Patent number 10,996,133
- Issue date May 4, 2021
- BAOYI GROUP CO. LTD.
- Changxiang Xu
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL

Patents Applicationslast 30 patents

Information Patent Application
SEALING TIGHTNESS TESTING DEVICE
- Publication number 20190025153
- Publication date Jan 24, 2019
- BAOYI GROUP CO. LTD.
- Changxiang XU
- G01 - MEASURING TESTING