- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection of materials for their magnetic properties
- H01F 27/255 - Magnetic cores made from particles
Patent holdings for IPC class H01F 27/255
Total number of patents in this class: 1700
10-year publication summary
|
140
|
150
|
144
|
152
|
165
|
132
|
99
|
99
|
95
|
54
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Murata Manufacturing Co., Ltd. | 25758 |
221 |
| Samsung Electro-mechanics Co., Ltd. | 6091 |
145 |
| Sumitomo Electric Industries, Ltd. | 16355 |
144 |
| TDK Corporation | 6876 |
120 |
| Sumitomo Wiring Systems, Ltd. | 11029 |
108 |
| AutoNetworks Technologies, Ltd. | 7130 |
108 |
| Taiyo Yuden Co., Ltd. | 2032 |
80 |
| Panasonic Intellectual Property Management Co., Ltd. | 34035 |
41 |
| Hitachi Metals, Ltd. | 1896 |
36 |
| Cyntec Co., Ltd. | 277 |
25 |
| Sumitomo Electric Sintered Alloy, Ltd. | 245 |
25 |
| TOKIN Corporation | 216 |
24 |
| Seiko Epson Corporation | 20259 |
22 |
| NTN Corporation | 4915 |
21 |
| JFE Steel Corporation | 7549 |
19 |
| CTM Magnetics, Inc. | 22 |
15 |
| Delta Electronics (Japan), Inc. | 50 |
15 |
| Sumida Corporation | 336 |
14 |
| Kyocera Corporation | 14383 |
12 |
| Alps Alpine Co., Ltd. | 2310 |
12 |
| Other owners | 493 |