Inventor · disambiguated record
Qingfeng Yu
Also filed as: YU QINGFENG
13 granted patents·3 pending applications·591 citations·filing 2004–2021
94Inventor score
Top patents by PatentIndex Score
16 records- 0198USD924980SUnicorn shaped game boardYU QINGFENG·Filed 2020·Granted Jul 13, 2021·53 cites·1 claims
- 0297USD944332SToyYU QINGFENG·Filed 2021·Granted Feb 22, 2022·36 cites·1 claims
- 0397USD924336SGame boardYU QINGFENG·Filed 2020·Granted Jul 6, 2021·45 cites·1 claims
- 0495US9617808B2Continuous oil pipe clamp mechanismYANTAI JEREH OILFIELD SERVICES GROUP CO LTD·Filed 2012·Granted Apr 11, 2017·161 cites·8 claims
- 0595US9493997B2Floating clamping device for injection head of continuous oil pipeLIU DONG·Filed 2011·Granted Nov 15, 2016·161 cites·9 claims
- 0694USD948630SToyYU QINGFENG·Filed 2021·Granted Apr 12, 2022·23 cites·1 claims
- 0794US9576210B1Sharpness-based frame selection for OCRAMAZON TECH INC·Filed 2014·Granted Feb 21, 2017·26 cites·22 claims
- 0893US9626577B1Image selection and recognition processing from a video feedAMAZON TECH INC·Filed 2014·Granted Apr 18, 2017·32 cites·16 claims
- 0992US9367736B1Text detection using features associated with neighboring glyph pairsAMAZON TECH INC·Filed 2015·Granted Jun 14, 2016·21 cites·20 claims
- 1090US9418316B1Sharpness-based frame selection for OCRAMAZON TECH INC·Filed 2014·Granted Aug 16, 2016·15 cites·12 claims
- 1181US8396737B2Website analysis combining quantitative and qualitative dataLAKSHMINARAYAN CHOUDUR K·Filed 2006·Granted Mar 12, 2013·16 cites·23 claims
- 1261US2025192198A1Ejector for fuel cell and fuel cellSCHAEFFLER TECHNOLOGIES AG·Filed 2021·Application pending·0 cites
- 1347US8572233B2Method and system for site path evaluation using web session clusteringYU QINGFENG·Filed 2004·Granted Oct 29, 2013·2 cites·14 claims
- 1445US2005114382A1Method and system for data segmentationFiled 2004·Application pending·0 cites
- 1544US11850618B2Nozzle assembly, ejecting device and ejecting methodYANTAI JEREH PETROLEUM EQUIPMENT & TECHNOLOGIES CO LTD·Filed 2020·Granted Dec 26, 2023·0 cites·20 claims
- 1636US2022339646A1Electrostatic spray deviceYANTAI JEREH PRETROLEUM EQUIPMENT & TECH CO LTD·Filed 2021·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →