IPC Classification

All sections
A - Human necessities
A61K - Preparations for medical, dental or toiletry purposes
A61K 31/395 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins

Patent holdings for IPC class A61K 31/395

144	176	187	196	177	158	525	739	785	391
2017	2018	2019	2020	2021	2022	2023	2024	2025	2026

Owner	All patents	This class
The Regents of the University of California	20802	65
Merck Sharp & Dohme LLC	3736	63
Purdue Research Foundation	3929	46
The Board of Trustees of the Leland Stanford Junior University	6678	42
The General Hospital Corporation	4869	33
Board of Regents, The University of Texas System	6135	32
University of Florida Research Foundation, Inc.	4184	31
The Regents of the University of Michigan	5012	30
Dana-Farber Cancer Institute, Inc.	2668	27
The Johns Hopkins University	5907	26
Praxis Precision Medicines, Inc.	234	23
University of Pittsburgh - Of the Commonwealth System of Higher Education	3322	22
Medtronic Ireland Manufacturing Unlimited Company	293	22
Centre National de La Recherche Scientifique	11055	21
Bristol-myers Squibb Company	4748	20
Achillion Pharmaceuticals, Inc.	156	20
The Trustees of Columbia University in the City of New York	3644	19
The Trustees of the University of Pennsylvania	4426	19
Kymera Therapeutics, Inc.	258	19
Medshine Discovery Inc.	588	17
Other owners		3840