- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection 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
|
11
|
12
|
18
|
9
|
10
|
8
|
11
|
11
|
1
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 1822 |
13 |
| Vacuumschmelze GmbH & Co. KG | 257 |
11 |
| Proterial, Ltd. | 952 |
7 |
| TDK Corporation | 6992 |
6 |
| Feintool International Holding AG | 95 |
5 |
| Seiko Epson Corporation | 20446 |
4 |
| LG Innotek Co., Ltd. | 8566 |
4 |
| Mitsui High-tec, Inc. | 261 |
4 |
| International Business Machines Corporation | 62805 |
3 |
| ABB Technology AG | 1218 |
3 |
| JFE Steel Corporation | 7632 |
3 |
| Kabushiki Kaisha Riken | 297 |
3 |
| Kuroda Precision Industries Ltd. | 114 |
3 |
| ThyssenKrupp Steel Europe AG | 996 |
3 |
| Hitachi Energy Ltd. | 2642 |
3 |
| Panasonic Corporation | 18716 |
2 |
| Panasonic Intellectual Property Management Co., Ltd. | 34471 |
2 |
| Analog Devices, Inc. | 3318 |
2 |
| Carnegie Mellon University | 1648 |
2 |
| Cummins Inc. | 2652 |
2 |
| Other owners | 67 |