Inventor · disambiguated record
Duanguang Zhang
Also filed as: ZHANG DUANGUANG
2 granted patents·0 citations·filing 2023–2023
20Inventor score
Technology areasE21B
Top patents by PatentIndex Score
2 records- 0138US12234692B2Automated apparatus for oil field drilling and workover operationsSHENGLI OILFIELD SHENGJI PETROLEUM EQUIPMENT CO LTD·Filed 2023·Granted Feb 25, 2025·0 cites·20 claims
- 0228US12371953B2Automatic small repair operation system for oil fieldSHENGLI OILFIELD SHENGJI PETROLEUM EQUIPMENT CO LTD·Filed 2023·Granted Jul 29, 2025·0 cites·10 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →