Inventor
LIU QINGYIAN
US41 patents
⚠️ This page may combine multiple inventors who share the name “LIU QINGYIAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AMGEN INC
32 patentsUS7919504B2Apr 5, 2011
Thiadiazole modulators of PKB
AMGEN INC30 citations92
US7265138B2Sep 4, 2007
Vanilloid receptor ligands and their use in treatments
AMGEN INC48 citations92
US7514566B2Apr 7, 2009
Thiazole compounds and methods of use
AMGEN INC38 citations90
US7115607B2Oct 3, 2006
Substituted piperazinyl amides and methods of use
AMGEN INC42 citations90
US9718803B2Aug 1, 2017
Unsaturated nitrogen heterocyclic compounds useful as PDE10 inhibitors
AMGEN INC8 citations84
US9303028B2Apr 5, 2016
Azetidine and piperidine compounds useful as PDE10 inhibitors
AMGEN INC4 citations84
US7579347B2Aug 25, 2009
Vanilloid receptor ligands and their use in treatments
AMGEN INC17 citations83
US6849639B2Feb 1, 2005
Integrin inhibitors and their methods of use
AMGEN INC19 citations83
US7807700B2Oct 5, 2010
Inhibitors of 11-β-hydroxy steroid dehydrogenase type 1
AMGEN INC12 citations82
US9556135B2Jan 31, 2017
Amino-dihydrothiazine and amino-dioxido dihydrothiazine compounds as beta-secretase antagonists and methods of use
AMGEN INC2 citations72
US9174992B2Nov 3, 2015
Heterobicyclic compounds
AMGEN INC4 citations72
US9096527B2Aug 4, 2015
TRPM8 antagonists and their use in treatments
AMGEN INC5 citations72
US8691986B2Apr 8, 2014
Azetidine and piperidine compounds useful as PDE10 inhibitors
AMGEN INC3 citations63
US9296734B2Mar 29, 2016
Perfluorinated 5,6-dihydro-4H-1,3-oxazin-2-amine compounds as beta-secretase inhibitors and methods of use
AMGEN INC2 citations62
US9096615B2Aug 4, 2015
Bridged bicyclic amino thiazine dioxide compounds as inhibitors of beta-secretase and methods of use thereof
AMGEN INC2 citations62
US7425631B2Sep 16, 2008
Compounds and methods of use
AMGEN INC2 citations62
US12459932B2Nov 4, 2025
KIF18A inhibitors
AMGEN INC1 citations61
US7393852B2Jul 1, 2008
Piperazine derivatives and methods of use
AMGEN INC3 citations60
US12509442B2Dec 30, 2025
KIF18A inhibitors
AMGEN INC0 citations59
US12054476B2Aug 6, 2024
KIF18A inhibitors
AMGEN INC1 citations59
US7541474B2Jun 2, 2009
Catalyzed process of making C-5-substituted heterocyclic inhibitors of 11β-hydroxy steroid dehydrogenase type 1
AMGEN INC5 citations57
US11548903B2Jan 10, 2023
Bicyclic thiazine and oxazine derivatives as beta-secretase inhibitors and methods of use
AMGEN INC0 citations52
US11021493B2Jun 1, 2021
1,4-thiazine dioxide and 1,2,4-thiadiazine dioxide derivatives as beta-secretase inhibitors and methods of use
AMGEN INC0 citations52
US9493459B2Nov 15, 2016
Azetidine and piperidine compounds useful as PDE10 inhibitors
AMGEN INC0 citations52
US10947223B2Mar 16, 2021
Substituted oxazines as beta-secretase inhibitors
AMGEN INC0 citations51
US10889579B2Jan 12, 2021
Thiazine derivatives as β-secretase inhibitors and methods of use
AMGEN INC0 citations51
US9725469B2Aug 8, 2017
Amino-oxazine and amino-dihydrothiazine compounds as beta-secretase modulators and methods of use
AMGEN INC1 citations51
US9550762B2Jan 24, 2017
Cyclopropyl fused thiazin-2-amine compounds as beta-secretase inhibitors and methods of use
AMGEN INC1 citations51
US7662811B2Feb 16, 2010
1,2,3,4-tetrahydropyrazin-2-yl acetamides and methods of use
AMGEN INC1 citations51
US12473289B2Nov 18, 2025
Heterocyclic compounds as delta-5 desaturase inhibitors and methods of use
AMGEN INC0 citations46
US10246429B2Apr 2, 2019
Vinyl fluoride cyclopropyl fused thiazin-2-amine compounds as beta-secretase inhibitors and methods of use
AMGEN INC0 citations41
US7932421B2Apr 26, 2011
N-cyclohexyl benzamides and benzeneacetamides as inhibitors of 11-beta-hydroxysteroid dehydrogenases
AMGEN INC0 citations41