Inventor · disambiguated record

Zemin Ji

Also filed as: JI ZEMIN

3 granted patents·0 citations·filing 2019–2020

39Inventor score

Technology areasE21B

Files withPETROCHINA CO LTD3

Top patents by PatentIndex Score

3 records

0145US11344824B2Ultrasonic microbubble generation method, apparatus and systemPETROCHINA CO LTD·Filed 2019·Granted May 31, 2022·0 cites·13 claims
0245US11179683B2Microbubble generation device and equipmentPETROCHINA CO LTD·Filed 2019·Granted Nov 23, 2021·0 cites·20 claims
0330US11428065B2Borehole wall resistance increasing apparatus for improving energy utilization rate of injection gasPETROCHINA CO LTD·Filed 2020·Granted Aug 30, 2022·0 cites·9 claims

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