- All sections
- H - Electricity
- H01M - Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy
- H01M 50/449 - Separators, membranes or diaphragms characterised by the material having a layered structure
Patent holdings for IPC class H01M 50/449
Total number of patents in this class: 1604
10-year publication summary
|
7
|
7
|
26
|
73
|
102
|
165
|
240
|
278
|
297
|
279
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| LG Energy Solution, Ltd. | 15482 |
259 |
| Samsung SDI Co., Ltd. | 8740 |
81 |
| Contemporary Amperex Technology Co., Limited | 7296 |
74 |
| Celgard, LLC | 317 |
65 |
| Panasonic Intellectual Property Management Co., Ltd. | 32095 |
60 |
| Zeon Corporation | 4116 |
50 |
| Ningde Amperex Technology Limited | 2261 |
46 |
| Contemporary Amperex Technology (Hong Kong) Limited | 3791 |
39 |
| Sumitomo Chemical Company, Limited | 9092 |
30 |
| SK Innovation Co., Ltd. | 1365 |
30 |
| SK IE Technology Co., Ltd. | 191 |
30 |
| Daramic, LLC | 219 |
28 |
| LG Chem, Ltd. | 17680 |
27 |
| Asahi Kasei Kabushiki Kaisha | 2705 |
26 |
| NGK Insulators, Ltd. | 5115 |
22 |
| Teijin Limited | 1260 |
21 |
| Toyota Motor Corporation | 33077 |
19 |
| GM Global Technology Operations LLC | 15220 |
19 |
| Toray Industries, Inc. | 7006 |
16 |
| Shenzhen Senior Technology Material Co., LTD | 77 |
15 |
| Other owners | 647 |