- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection of materials for their magnetic properties
- H01F 1/22 - Magnets or magnetic bodies characterised by the magnetic materials thereforSelection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
Patent holdings for IPC class H01F 1/22
Total number of patents in this class: 205
10-year publication summary
|
14
|
19
|
9
|
17
|
21
|
18
|
7
|
10
|
7
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 1983 |
16 |
| Murata Manufacturing Co., Ltd. | 24542 |
15 |
| Sumitomo Electric Industries, Ltd. | 15495 |
9 |
| TDK Corporation | 6748 |
8 |
| Cyntec Co., Ltd. | 256 |
7 |
| National Institute of Advanced Industrial Science and Technology | 3802 |
7 |
| JFE Steel Corporation | 6852 |
7 |
| AIDA Engineering, Ltd. | 134 |
6 |
| Denso Corporation | 24316 |
5 |
| Alps Electric Co., Ltd. | 809 |
4 |
| Sumitomo Electric Sintered Alloy, Ltd. | 227 |
4 |
| Tohoku Magnet Institute Co., Ltd. | 24 |
4 |
| Delta Electronics (Japan), Inc. | 42 |
4 |
| Hitachi, Ltd. | 15495 |
3 |
| Panasonic Intellectual Property Management Co., Ltd. | 31475 |
3 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2874 |
3 |
| Taiyo Yuden Co., Ltd. | 1940 |
3 |
| TOKIN Corporation | 205 |
3 |
| Resonac Corporation | 2815 |
3 |
| Siemens AG | 24477 |
2 |
| Other owners | 89 |