Assignee
QSO INC
CA·2 granted patents·5 citations·filing 2020–2022
Top patents by PatentIndex Score
2 records- 0179US11549334B2Elongated flow stopper and check valve thereofQSO INC·Filed 2022·Granted Jan 10, 2023·2 cites·20 claims
- 0279US11274524B2Elongated flow stopper in standing valve of bottom hole spring assembly for facilitating production of hydrocarbonsQSO INC·Filed 2020·Granted Mar 15, 2022·3 cites·20 claims
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