- All sections
- H - Electricity
- H01F - Magnets; inductances; transformers; selection of materials for their magnetic properties
- H01F 41/02 - Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus 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: 4375
10-year publication summary
335
|
348
|
362
|
400
|
347
|
355
|
420
|
397
|
308
|
109
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Hitachi Metals, Ltd. | 2175 |
217 |
Murata Manufacturing Co., Ltd. | 22355 |
192 |
TDK Corporation | 6306 |
165 |
Sumitomo Electric Industries, Ltd. | 14131 |
99 |
Proterial, Ltd. | 638 |
89 |
JFE Steel Corporation | 6067 |
88 |
Nippon Steel Corporation | 5649 |
74 |
Shin-Etsu Chemical Co., Ltd. | 5132 |
73 |
Nitto Denko Corporation | 7879 |
71 |
Toyota Motor Corporation | 28582 |
64 |
Fujian Changting Golden Dragon Rare-earth Co., Ltd. | 81 |
62 |
Xiamen Tungsten Co., Ltd. | 99 |
60 |
TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
54 |
Taiyo Yuden Co., Ltd. | 1809 |
53 |
Samsung Electro-mechanics Co., Ltd. | 4798 |
37 |
Nissan Motor Co., Ltd. | 12249 |
37 |
Sumitomo Wiring Systems, Ltd. | 9367 |
37 |
AutoNetworks Technologies, Ltd. | 5809 |
35 |
Intermetallics Co., Ltd. | 34 |
34 |
Mitsui High-tec, Inc. | 265 |
34 |
Other owners | 2800 |