- All sections
- H - Electricity
- H01H - Electric switchesrelaysselectorsemergency protective devices
- H01H 33/56 - Gas reservoirs
Patent holdings for IPC class H01H 33/56
Total number of patents in this class: 255
10-year publication summary
|
23
|
27
|
18
|
17
|
13
|
17
|
12
|
17
|
15
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Energy Ltd. | 2568 |
42 |
| Siemens AG | 24033 |
22 |
| Mitsubishi Electric Corporation | 47971 |
20 |
| General Electric Technology GmbH | 1336 |
19 |
| Siemens Energy Global GmbH & Co. KG | 3335 |
16 |
| ABB Schweiz AG | 7590 |
15 |
| ABB Technology AG | 1224 |
13 |
| Alstom Technology Ltd | 1045 |
9 |
| Toshiba Corporation | 12548 |
8 |
| Schneider Electric Industries SAS | 1592 |
6 |
| Eaton Intelligent Power Limited | 6236 |
5 |
| Hitachi Energy Switzerland AG | 299 |
5 |
| Toshiba Energy Systems & Solutions Corp. | 1150 |
4 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6181 |
4 |
| GE Vernova Infrastructure Technology LLC | 506 |
4 |
| Arkema France | 4238 |
3 |
| Southern States, LLC | 84 |
3 |
| WIKA Alexander Wiegand SE & Co. KG | 242 |
3 |
| ABB Research Ltd. | 796 |
2 |
| Firma DILO Armaturen und Anlagen GmbH | 3 |
2 |
| Other owners | 50 |