- 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: 1620
10-year publication summary
|
124
|
98
|
122
|
96
|
94
|
149
|
128
|
91
|
117
|
62
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TDK Corporation | 6702 |
178 |
| Shin-Etsu Chemical Co., Ltd. | 5632 |
79 |
| Fujian Changting Golden Dragon Rare-earth Co., Ltd. | 78 |
70 |
| Xiamen Tungsten Co., Ltd. | 105 |
68 |
| Proterial, Ltd. | 832 |
59 |
| Hitachi Metals, Ltd. | 1985 |
56 |
| Fujian Golden Dragon Rare-earth Co., Ltd. | 64 |
54 |
| Yantai Zhenghai Magnetic Material Co., Ltd. | 48 |
37 |
| Nitto Denko Corporation | 8219 |
33 |
| Toyota Motor Corporation | 31764 |
32 |
| Hitachi, Ltd. | 15467 |
29 |
| Daido Steel Co., Ltd. | 269 |
29 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12837 |
27 |
| Yantai Dongxing Magnetic Materials Inc. | 33 |
27 |
| Mitsubishi Electric Corporation | 45946 |
21 |
| Beijing Zhong Ke San Huan Hi-Tech Co.,Ltd | 38 |
20 |
| Ford Global Technologies, LLC | 20505 |
19 |
| Intermetallics Co., Ltd. | 33 |
19 |
| Aichi Steel Corporation | 383 |
18 |
| LG Chem, Ltd. | 17594 |
15 |
| Other owners | 730 |