Assignee
DUONG KHANH ANH
US·2 granted patents·1 pending application·5 citations·filing 2011–2012
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0165US8720586B2Hybrid sealDUONG KHANH ANH·Filed 2011·Granted May 13, 2014·3 cites·13 claims
- 0262US8851185B2Dual metal seal systemDUONG KHANH ANH·Filed 2012·Granted Oct 7, 2014·2 cites·11 claims
- 0338US2013299193A1Positive retention lock ring for tubing hangerDUONG KHANH ANH·Filed 2012·Application pending·0 cites
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →