- 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: 207
10-year publication summary
|
8
|
12
|
14
|
14
|
25
|
10
|
13
|
11
|
17
|
15
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Energy Ltd. | 2579 |
23 |
| ABB Technology AG | 1224 |
17 |
| Siemens AG | 24029 |
11 |
| ABB Schweiz AG | 7607 |
10 |
| Philippe Magnier LLC | 7 |
7 |
| Mitsubishi Electric Corporation | 48018 |
6 |
| ABB Power Grids Switzerland AG | 212 |
6 |
| Siemens Energy AS | 151 |
6 |
| Siemens Energy Global GmbH & Co. KG | 3345 |
6 |
| Comem S.p.A. | 23 |
4 |
| Ctr Manufacturing Industries Limited | 9 |
4 |
| Maschinenfabrik Reinhausen GmbH | 582 |
4 |
| Shanghai United Imaging Healthcare Co., Ltd. | 2116 |
4 |
| General Electric Technology GmbH | 1337 |
3 |
| Korea Electric Power Corporation | 463 |
3 |
| OneSubsea IP UK Limited | 438 |
3 |
| GE Infrastructure Technology, LLC | 6171 |
3 |
| Siemens Gamesa Renewable Energy A/S | 1961 |
3 |
| CRRC Zhuzhou Electric Co., Ltd | 60 |
3 |
| The Ardry Group | 3 |
3 |
| Other owners | 78 |