- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 21/04 - Electrical locking and release of the routeElectrical repeat locks
Patent holdings for IPC class B61L 21/04
Total number of patents in this class: 37
10-year publication summary
|
5
|
6
|
1
|
1
|
1
|
1
|
3
|
0
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens AG | 24286 |
8 |
| Siemens Mobility GmbH | 1794 |
5 |
| Siemens Schweiz AG | 619 |
3 |
| Alstom Holdings | 620 |
2 |
| Ineo Urban Transportation Solutions | 5 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 8962 |
1 |
| Hitachi, Ltd. | 15803 |
1 |
| Siemens S.A.S. | 45 |
1 |
| ABB Research Ltd. | 843 |
1 |
| BYD Company Limited | 5881 |
1 |
| Casco Signal Ltd. | 65 |
1 |
| CRRC Qingdao Sifang Co., Ltd. | 395 |
1 |
| East Japan Railway Company | 66 |
1 |
| QuEST Rail LLC | 6 |
1 |
| Siemens Rail Automation Holdings Limited | 10 |
1 |
| Thales Deutschland GmbH | 60 |
1 |
| Westinghouse Air Brake Technologies Corporation | 498 |
1 |
| Frauscher Sensortechnik GmbH | 48 |
1 |
| Mitsubishi Heavy Industries Engineering, Ltd. | 194 |
1 |
| Coordem Transport Tech. Co., Ltd. | 6 |
1 |
| Other owners | 2 |