- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection of materials for their magnetic properties
- H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformersApparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils or magnets
Patent holdings for IPC class H01F 41/02
Total number of patents in this class: 4810
10-year publication summary
|
348
|
362
|
400
|
350
|
356
|
422
|
408
|
319
|
331
|
196
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 1982 |
207 |
| Murata Manufacturing Co., Ltd. | 24526 |
206 |
| TDK Corporation | 6738 |
165 |
| Nippon Steel Corporation | 6238 |
101 |
| Sumitomo Electric Industries, Ltd. | 15483 |
97 |
| JFE Steel Corporation | 6840 |
97 |
| Proterial, Ltd. | 846 |
86 |
| Shin-Etsu Chemical Co., Ltd. | 5658 |
73 |
| Nitto Denko Corporation | 8231 |
71 |
| Toyota Motor Corporation | 32116 |
66 |
| Fujian Changting Golden Dragon Rare-earth Co., Ltd. | 78 |
62 |
| Xiamen Tungsten Co., Ltd. | 105 |
60 |
| Taiyo Yuden Co., Ltd. | 1936 |
58 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12798 |
51 |
| Nichia Corporation | 3701 |
41 |
| Samsung Electro-mechanics Co., Ltd. | 5614 |
39 |
| Sumitomo Wiring Systems, Ltd. | 10351 |
39 |
| Nissan Motor Co., Ltd. | 12484 |
37 |
| AutoNetworks Technologies, Ltd. | 6587 |
37 |
| Hitachi, Ltd. | 15484 |
35 |
| Other owners | 3182 |