- All sections
- H - Electricity
- H01H - Electric switchesrelaysselectorsemergency protective devices
- H01H 33/91 - 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 the arc-extinguishing fluid being air or gas
Patent holdings for IPC class H01H 33/91
Total number of patents in this class: 164
10-year publication summary
|
7
|
11
|
15
|
12
|
11
|
4
|
8
|
7
|
2
|
8
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Energy Ltd. | 2593 |
26 |
| Mitsubishi Electric Corporation | 48097 |
15 |
| ABB Technology AG | 1224 |
12 |
| Siemens AG | 24011 |
11 |
| Toshiba Corporation | 12577 |
11 |
| ABB Schweiz AG | 7640 |
11 |
| General Electric Technology GmbH | 1337 |
11 |
| Siemens Energy Global GmbH & Co. KG | 3402 |
11 |
| Toshiba Energy Systems & Solutions Corp. | 1148 |
10 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6172 |
6 |
| Hitachi, Ltd. | 16146 |
4 |
| Alstom Technology Ltd | 1039 |
4 |
| ILJIN Electric Co., Ltd. | 36 |
3 |
| Hitachi Energy Switzerland AG | 299 |
3 |
| China XD Electric Co.,Ltd. | 32 |
2 |
| Lsis Co., Ltd. | 815 |
2 |
| 3m Innovative Properties Company | 17484 |
1 |
| Eaton Corporation | 1803 |
1 |
| Hamilton Sundstrand Corporation | 5013 |
1 |
| Siemens Energy, Inc. | 1685 |
1 |
| Other owners | 18 |