- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection of materials for their magnetic properties
- H01F 1/057 - Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
Patent holdings for IPC class H01F 1/057
Total number of patents in this class: 1728
10-year publication summary
|
98
|
122
|
96
|
94
|
149
|
131
|
91
|
117
|
100
|
50
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TDK Corporation | 6876 |
182 |
| Shin-Etsu Chemical Co., Ltd. | 6109 |
81 |
| Fujian Changting Golden Dragon Rare-earth Co., Ltd. | 78 |
70 |
| Xiamen Tungsten Co., Ltd. | 108 |
68 |
| Fujian Golden Dragon Rare-earth Co., Ltd. | 74 |
64 |
| Proterial, Ltd. | 938 |
61 |
| Hitachi Metals, Ltd. | 1896 |
56 |
| Yantai Zhenghai Magnetic Material Co., Ltd. | 56 |
43 |
| Toyota Motor Corporation | 35813 |
33 |
| Nitto Denko Corporation | 8540 |
33 |
| Yantai Dongxing Magnetic Materials Inc. | 36 |
29 |
| Hitachi, Ltd. | 16113 |
28 |
| Daido Steel Co., Ltd. | 284 |
28 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12378 |
27 |
| Beijing Zhong Ke San Huan Hi-Tech Co.,Ltd | 47 |
26 |
| Mitsubishi Electric Corporation | 48048 |
24 |
| Ford Global Technologies, LLC | 21524 |
19 |
| Intermetallics Co., Ltd. | 33 |
19 |
| Aichi Steel Corporation | 392 |
18 |
| Nantong Zhenghai Magnet Co., Ltd. | 19 |
17 |
| Other owners | 802 |