Zhongnan Xu

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Fuzhou, CN

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Patents Grantslast 30 patents

Information Patent Grant
Elevator operation quality tester
- Patent number 11,365,089
- Issue date Jun 21, 2022
- FUJIAN SPECIAL EQUIPMENT INSPECTION AND RESEARCH INSTITUTE
- Wei Zhang
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
ELEVATOR OPERATION QUALITY DETECTING SYSTEM AND DETECTING METHOD
- Publication number 20210122611
- Publication date Apr 29, 2021
- FUJIAN SPECIAL EQUIPMENT INSPECTION AND RESEARCH INSTITUTE
- QINDA ZENG
- B66 - HOISTING LIFTING HAULING
Information Patent Application
ELEVATOR OPERATION QUALITY TESTER
- Publication number 20200223662
- Publication date Jul 16, 2020
- Wei Zhang
- G01 - MEASURING TESTING