- All sections
- H - Electricity
- H01F - Magnetsinductancestransformersselection of materials for their magnetic properties
- H01F 27/14 - Expansion chambersOil conservatorsGas cushionsArrangements for purifying, drying, or filling
Patent holdings for IPC class H01F 27/14
Total number of patents in this class: 188
10-year publication summary
|
8
|
8
|
12
|
14
|
14
|
25
|
10
|
13
|
11
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ABB Technology AG | 1256 |
17 |
| Siemens AG | 24568 |
15 |
| Hitachi Energy Ltd. | 2177 |
13 |
| ABB Schweiz AG | 6873 |
10 |
| Mitsubishi Electric Corporation | 45752 |
6 |
| Ctr Manufacturing Industries Limited | 11 |
6 |
| ABB Power Grids Switzerland AG | 212 |
6 |
| Siemens Energy AS | 156 |
6 |
| General Electric Technology GmbH | 1457 |
5 |
| Maschinenfabrik Reinhausen GmbH | 748 |
5 |
| Siemens Energy Global GmbH & Co. KG | 2912 |
5 |
| Comem S.p.A. | 19 |
4 |
| Philippe Magnier LLC | 4 |
4 |
| Shanghai United Imaging Healthcare Co., Ltd. | 1861 |
4 |
| Korea Electric Power Corporation | 468 |
3 |
| OneSubsea IP UK Limited | 414 |
3 |
| GE Infrastructure Technology, LLC | 6191 |
3 |
| Siemens Gamesa Renewable Energy A/S | 1853 |
3 |
| The Ardry Group | 3 |
3 |
| Zhejiang ERG Technology Joint Stock Co., Ltd | 15 |
3 |
| Other owners | 64 |