- All sections
- H - Electricity
- H01H - Electric switches; relays; selectors; emergency 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: 45
10-year publication summary
6
|
5
|
4
|
2
|
2
|
6
|
2
|
4
|
7
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Mitsubishi Electric Corporation | 43934 |
8 |
Hitachi Industrial Equipment Systems Co., Ltd. | 1334 |
4 |
Schneider Electric Industries SAS | 1376 |
3 |
Xi'an Jiaotong University | 579 |
3 |
LS ELECTRIC Co., Ltd | 506 |
3 |
Hitachi Energy Ltd. | 1921 |
3 |
Southern Electrical Equipment Co., Inc | 3 |
2 |
Supergrid Institute SAS | 35 |
2 |
ABB Power Grids Switzerland AG | 227 |
2 |
Siemens AG | 24990 |
1 |
Hitachi, Ltd. | 16452 |
1 |
ABB Technology AG | 1301 |
1 |
Cooper Technologies Company | 664 |
1 |
Hyosung Corporation | 300 |
1 |
Japan AE Power Systems Corporation | 29 |
1 |
Jiangsu Modern Electric Technology Co., Ltd. | 15 |
1 |
Ledbetter, Finley Lee | 2 |
1 |
Nissin Electric Co., Ltd. | 213 |
1 |
S & C Electric Co. | 282 |
1 |
S&C Electric Company | 172 |
1 |
Other owners | 4 |