- All sections
- H - Electricity
- H01H - Electric switchesrelaysselectorsemergency protective devices
- H01H 33/90 - Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by, or in conjunction with, the contact-operating mechanism
Patent holdings for IPC class H01H 33/90
Total number of patents in this class: 107
10-year publication summary
|
3
|
11
|
12
|
10
|
5
|
2
|
3
|
4
|
1
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Energy Ltd. | 2610 |
15 |
| General Electric Technology GmbH | 1336 |
13 |
| Siemens AG | 23996 |
10 |
| ABB Technology AG | 1221 |
9 |
| ABB Schweiz AG | 7665 |
8 |
| Mitsubishi Electric Corporation | 48172 |
7 |
| Alstom Technology Ltd | 1036 |
7 |
| Siemens Energy Global GmbH & Co. KG | 3432 |
7 |
| Toshiba Corporation | 12594 |
4 |
| ILJIN Electric Co., Ltd. | 36 |
3 |
| Eaton Corporation | 1803 |
2 |
| ABB Research Ltd. | 781 |
2 |
| Toshiba Energy Systems & Solutions Corp. | 1149 |
2 |
| Hitachi Energy Switzerland AG | 299 |
2 |
| Hitachi, Ltd. | 16163 |
1 |
| ALSTOM Grid SAS | 3 |
1 |
| Siemens Energy, Inc. | 1686 |
1 |
| Siemens Industry, Inc. | 1585 |
1 |
| Bharat Heavy Electricals Ltd. | 3 |
1 |
| EMA Electromechanics, LLC | 3 |
1 |
| Other owners | 10 |