- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection of materials for their magnetic properties
- H01F 1/24 - 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 the particles being insulated
Patent holdings for IPC class H01F 1/24
Total number of patents in this class: 489
10-year publication summary
|
29
|
27
|
30
|
34
|
36
|
34
|
23
|
28
|
30
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TDK Corporation | 6543 |
45 |
| Sumitomo Electric Industries, Ltd. | 14990 |
35 |
| Taiyo Yuden Co., Ltd. | 1889 |
29 |
| Hitachi Metals, Ltd. | 2020 |
27 |
| Murata Manufacturing Co., Ltd. | 23743 |
26 |
| Höganäs AB | 322 |
21 |
| Sumitomo Electric Sintered Alloy, Ltd. | 222 |
19 |
| NTN Corporation | 4980 |
15 |
| JFE Steel Corporation | 6580 |
13 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2907 |
13 |
| Toshiba Corporation | 12060 |
12 |
| TOKIN Corporation | 203 |
11 |
| Persimmon Technologies, Corp. | 149 |
10 |
| Seiko Epson Corporation | 19005 |
9 |
| CTM Magnetics, Inc. | 44 |
9 |
| Dowa Electronics Materials Co., Ltd. | 622 |
8 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13080 |
7 |
| Samsung Electro-mechanics Co., Ltd. | 5216 |
6 |
| Hitachi Powdered Metals Co., Ltd. | 14 |
6 |
| Massachusetts Development Finance Agency | 33 |
6 |
| Other owners | 162 |