- 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: 56
10-year publication summary
|
4
|
2
|
2
|
6
|
2
|
4
|
7
|
6
|
5
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 47625 |
9 |
| Hitachi Energy Ltd. | 2502 |
7 |
| Hitachi Industrial Equipment Systems Co., Ltd. | 1520 |
4 |
| Xi'an Jiaotong University | 710 |
4 |
| Schneider Electric Industries SAS | 1562 |
3 |
| Southern Electrical Equipment Co., Inc | 4 |
3 |
| LS ELECTRIC Co., Ltd | 789 |
3 |
| CRRC Tangshan Co., Ltd. | 276 |
2 |
| Supergrid Institute SAS | 38 |
2 |
| ABB Power Grids Switzerland AG | 212 |
2 |
| Siemens AG | 24199 |
1 |
| Hitachi, Ltd. | 15904 |
1 |
| ABB Technology AG | 1233 |
1 |
| Cooper Technologies Company | 621 |
1 |
| Hyosung Corporation | 285 |
1 |
| Japan AE Power Systems Corporation | 20 |
1 |
| Jiangsu Modern Electric Technology Co., Ltd. | 15 |
1 |
| Nissin Electric Co., Ltd. | 263 |
1 |
| S & C Electric Co. | 279 |
1 |
| S&C Electric Company | 182 |
1 |
| Other owners | 7 |