- 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: 3304
10-year publication summary
|
183
|
248
|
205
|
192
|
211
|
212
|
217
|
202
|
246
|
203
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Boehringer Ingelheim International GmbH | 4644 |
52 |
| Woolsey Pharmaceuticals, Inc. | 80 |
49 |
| Novartis AG | 10707 |
43 |
| Merck Sharp & Dohme LLC | 3737 |
43 |
| Dana-Farber Cancer Institute, Inc. | 2602 |
37 |
| Nippon Chemiphar Co., Ltd. | 232 |
34 |
| Bristol-myers Squibb Company | 4840 |
33 |
| F. Hoffmann-La Roche AG | 7946 |
30 |
| Takeda Pharmaceutical Company Limited | 2704 |
30 |
| GW Research Limited | 196 |
29 |
| Kowa Company, Ltd. | 1202 |
27 |
| The Regents of the University of California | 20153 |
25 |
| Alkermes Pharma Ireland Limited | 268 |
25 |
| Genentech, Inc. | 4012 |
24 |
| Gilead Sciences, Inc. | 2062 |
23 |
| Neurosearch A/S | 176 |
21 |
| Janssen Pharmaceutica N.V. | 3367 |
20 |
| Hoffmann-La Roche Inc. | 3489 |
19 |
| Astellas Pharma Inc. | 1071 |
19 |
| Merck Patent GmbH | 5764 |
17 |
| Other owners | 2704 |