- All sections
- H - Electricity
- H01H - Electric switchesrelaysselectorsemergency protective devices
- H01H 33/668 - Means for obtaining or monitoring the vacuum
Patent holdings for IPC class H01H 33/668
Total number of patents in this class: 51
10-year publication summary
|
5
|
4
|
2
|
1
|
6
|
2
|
4
|
7
|
5
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 46590 |
9 |
| Hitachi Energy Ltd. | 2305 |
6 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1466 |
4 |
| Xi'an Jiaotong University | 669 |
4 |
| Schneider Electric Industries SAS | 1506 |
3 |
| LS ELECTRIC Co., Ltd | 737 |
3 |
| Southern Electrical Equipment Co., Inc | 3 |
2 |
| Supergrid Institute SAS | 38 |
2 |
| ABB Power Grids Switzerland AG | 212 |
2 |
| Siemens AG | 24353 |
1 |
| Hitachi, Ltd. | 15599 |
1 |
| ABB Technology AG | 1251 |
1 |
| Cooper Technologies Company | 629 |
1 |
| CRRC Tangshan Co., Ltd. | 261 |
1 |
| Hyosung Corporation | 289 |
1 |
| Japan AE Power Systems Corporation | 22 |
1 |
| Jiangsu Modern Electric Technology Co., Ltd. | 15 |
1 |
| Nissin Electric Co., Ltd. | 254 |
1 |
| S & C Electric Co. | 293 |
1 |
| S&C Electric Company | 185 |
1 |
| Other owners | 5 |