Lin Yuan

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Superhigh torsional strength, metallic and airtight drillrod coupler
- Patent number 11,262,005
- Issue date Mar 1, 2022
- Baoshan Iron & Steel Co., Ltd.
- Peng Zhao
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
SUPERHIGH TORSIONAL STRENGTH, METALLIC AND AIRTIGHT DRILLROD COUPLER
- Publication number 20160230909
- Publication date Aug 11, 2016
- Baoshan Iron & Steel Co., Ltd
- Peng Zhao
- E21 - EARTH DRILLING MINING