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Qingbo Song
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Dezhou, CN
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Patents Grants
last 30 patents
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Patent Grant
Safety device for hydrodynamic pressure regulating pipe network
Patent number
11,281,243
Issue date
Mar 22, 2022
Shandong Keyuan Water Supply and Drainage Equipment Engineering Co., Ltd.
Yonghua Zhang
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Patents Applications
last 30 patents
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Patent Application
Safety Device For Hydrodynamic Pressure Regulating Pipe Network
Publication number
20210341955
Publication date
Nov 4, 2021
Shandong Keyuan Water Supply And Drainage Equipment Engineering Co. Ltd.
Yonghua Zhang
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...