- All sections
- H - Electricity
- H02H - Emergency protective circuit arrangements
- H02H 3/52 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations responsive to the appearance of harmonics
Patent holdings for IPC class H02H 3/52
Total number of patents in this class: 49
10-year publication summary
|
6
|
3
|
1
|
7
|
6
|
5
|
2
|
1
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| TechHold, LLC | 45 |
6 |
| ABB Research Ltd. | 913 |
3 |
| Emprimus, LLC | 16 |
3 |
| Lsis Co., Ltd. | 817 |
2 |
| Schweitzer Engineering Laboratories, Inc. | 920 |
2 |
| University of Memphis Research Foundation | 112 |
2 |
| Landis+Gyr Technology, Inc. | 435 |
2 |
| Faraday Predictive Ltd | 7 |
2 |
| Intelesol, LLC | 38 |
2 |
| Siemens AG | 24573 |
1 |
| Eaton Corporation | 1831 |
1 |
| Robert Bosch GmbH | 41765 |
1 |
| Mitsubishi Electric Corporation | 44794 |
1 |
| Northrop Grumman Systems Corporation | 2922 |
1 |
| Hamilton Sundstrand Corporation | 4724 |
1 |
| Kaneka Corporation | 4497 |
1 |
| ABB Schweiz AG | 6624 |
1 |
| ABB Technology AG | 1272 |
1 |
| Advanced Power Technologies, Inc | 4 |
1 |
| Arizona Board of Regents on behalf of Arizona State University | 2455 |
1 |
| Other owners | 14 |