- All sections
- A - Human necessities
- A61K - Preparations for medical, dental or toiletry purposes
- A61K 31/551 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogens as ring hetero atoms, e.g. clozapine, dilazep
Patent holdings for IPC class A61K 31/551
Total number of patents in this class: 3329
10-year publication summary
|
183
|
248
|
205
|
192
|
211
|
212
|
217
|
202
|
246
|
240
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Boehringer Ingelheim International GmbH | 4626 |
51 |
| Woolsey Pharmaceuticals, Inc. | 83 |
51 |
| Novartis AG | 10595 |
43 |
| Merck Sharp & Dohme LLC | 3735 |
42 |
| Dana-Farber Cancer Institute, Inc. | 2629 |
37 |
| Nippon Chemiphar Co., Ltd. | 236 |
35 |
| Bristol-myers Squibb Company | 4821 |
33 |
| F. Hoffmann-La Roche AG | 7932 |
30 |
| Takeda Pharmaceutical Company Limited | 2726 |
30 |
| GW Research Limited | 170 |
29 |
| Kowa Company, Ltd. | 1213 |
27 |
| The Regents of the University of California | 20315 |
25 |
| Genentech, Inc. | 4016 |
23 |
| Alkermes Pharma Ireland Limited | 260 |
23 |
| Gilead Sciences, Inc. | 2110 |
23 |
| Neurosearch A/S | 169 |
21 |
| Hoffmann-La Roche Inc. | 3548 |
19 |
| Janssen Pharmaceutica N.V. | 3357 |
19 |
| Centre National de La Recherche Scientifique | 10716 |
19 |
| Astellas Pharma Inc. | 1054 |
19 |
| Other owners | 2730 |