- 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: 241
10-year publication summary
|
23
|
23
|
27
|
18
|
17
|
13
|
17
|
12
|
17
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Energy Ltd. | 2192 |
38 |
| Siemens AG | 24525 |
22 |
| Mitsubishi Electric Corporation | 45946 |
20 |
| General Electric Technology GmbH | 1371 |
18 |
| ABB Schweiz AG | 6917 |
15 |
| ABB Technology AG | 1256 |
14 |
| Siemens Energy Global GmbH & Co. KG | 2937 |
13 |
| Alstom Technology Ltd | 1109 |
9 |
| Toshiba Corporation | 12317 |
8 |
| Schneider Electric Industries SAS | 1478 |
6 |
| Eaton Intelligent Power Limited | 5974 |
5 |
| Hitachi Energy Switzerland AG | 303 |
5 |
| Toshiba Energy Systems & Solutions Corp. | 1074 |
4 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6271 |
4 |
| Arkema France | 4051 |
3 |
| Southern States, LLC | 68 |
3 |
| WIKA Alexander Wiegand SE & Co. KG | 238 |
3 |
| ABB Research Ltd. | 889 |
2 |
| Firma DILO Armaturen und Anlagen GmbH | 3 |
2 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3956 |
2 |
| Other owners | 45 |