Inventor · disambiguated record
Haijin Zheng
Also filed as: ZHENG HAIJIN
1 granted patent·1 pending application·13 citations·filing 2000–2019
34Inventor score
Files withCHINA PETROLEUM & CHEMICAL1YANGZHOU JIANGSU OILFIELD RUIDA PETROLEUM ENGINEERING TECH DEVELOPMENT CO LTD1
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2 records- 0158US6640896B1Mechanical oil recovery method and system with a sucker rod pumpCHINA PETROLEUM & CHEMICAL·Filed 2000·Granted Nov 4, 2003·13 cites·18 claims
- 0227US2021270124A1Method for distinguishing authenticity of high-pressure physical property parameters of oil reservoirsYANGZHOU JIANGSU OILFIELD RUIDA PETROLEUM ENGINEERING TECH DEVELOPMENT CO LTD·Filed 2019·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →