- All sections
- H - Electricity
- H01F - Magnets; inductances; transformers; selection 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: 1447
10-year publication summary
|
81
|
110
|
140
|
150
|
144
|
152
|
158
|
125
|
95
|
24
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Murata Manufacturing Co., Ltd. | 22355 |
168 |
| Samsung Electro-mechanics Co., Ltd. | 4798 |
134 |
| Sumitomo Electric Industries, Ltd. | 14131 |
132 |
| Sumitomo Wiring Systems, Ltd. | 9367 |
94 |
| AutoNetworks Technologies, Ltd. | 5809 |
94 |
| TDK Corporation | 6306 |
86 |
| Taiyo Yuden Co., Ltd. | 1809 |
73 |
| Hitachi Metals, Ltd. | 2175 |
37 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
24 |
| NTN Corporation | 5008 |
21 |
| CTM Magnetics, Inc. | 45 |
21 |
| Sumitomo Electric Sintered Alloy, Ltd. | 214 |
20 |
| TOKIN Corporation | 199 |
20 |
| Cyntec Co., Ltd. | 232 |
19 |
| JFE Steel Corporation | 6067 |
18 |
| Alps Alpine Co., Ltd. | 1831 |
18 |
| Seiko Epson Corporation | 18724 |
14 |
| Sumida Corporation | 291 |
14 |
| Kyocera Corporation | 12735 |
12 |
| Nitto Denko Corporation | 7879 |
10 |
| Other owners | 418 |