Inventor · name-matched record

DING XUDONG

1 granted patent·0 citations·filing 2025–2025

1Inventor score

Technology areasE21B

Files withSHIJIAZHUANG ZHIDI PETROLEUM ENGINEERING TECH CO LTD1

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1 record

0139US12577861B2Liquid accumulation-free production and drainage system for oil and gas wellSHIJIAZHUANG ZHIDI PETROLEUM ENGINEERING TECH CO LTD·Filed 2025·Granted Mar 17, 2026·0 cites·6 claims

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Identity basis: exact name match across USPTO filings. How scoring works →