- All sections
- H - Electricity
- H01F - Magnets; inductances; transformers; selection of materials for their magnetic properties
- H01F 3/04 - Cores, yokes or armatures made from strips or ribbons
Patent holdings for IPC class H01F 3/04
Total number of patents in this class: 152
10-year publication summary
|
10
|
11
|
11
|
12
|
18
|
8
|
10
|
8
|
10
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 2175 |
16 |
| Vacuumschmelze GmbH & Co. KG | 253 |
12 |
| Proterial, Ltd. | 638 |
7 |
| TDK Corporation | 6306 |
6 |
| Feintool International Holding AG | 113 |
5 |
| Mitsui High-tec, Inc. | 265 |
4 |
| Hitachi Energy Ltd. | 1921 |
4 |
| International Business Machines Corporation | 60644 |
3 |
| Seiko Epson Corporation | 18724 |
3 |
| Hitachi, Ltd. | 16452 |
3 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
3 |
| LG Innotek Co., Ltd. | 6758 |
3 |
| ABB Technology AG | 1301 |
3 |
| JFE Steel Corporation | 6067 |
3 |
| Metglas, Inc. | 44 |
3 |
| ThyssenKrupp AG | 3086 |
3 |
| ThyssenKrupp Steel Europe AG | 924 |
3 |
| Alps Alpine Co., Ltd. | 1831 |
3 |
| Panasonic Corporation | 20786 |
2 |
| Analog Devices, Inc. | 3475 |
2 |
| Other owners | 61 |