- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 1/20 - Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
Patent holdings for IPC class B61L 1/20
Total number of patents in this class: 104
10-year publication summary
|
7
|
13
|
10
|
3
|
5
|
6
|
2
|
2
|
5
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility, Inc. | 369 |
9 |
| Siemens AG | 24337 |
8 |
| Alstom Holdings | 620 |
5 |
| Siemens Industry, Inc. | 1585 |
5 |
| Robel Bahnbaumaschinen GmbH | 113 |
5 |
| General Electric Company | 13789 |
4 |
| BNSF Railway Company | 493 |
4 |
| Thales Management & Services Deutschland GmbH | 62 |
4 |
| KB Signaling Inc. | 119 |
4 |
| Progress Rail Services Corp | 222 |
3 |
| Metrom Rail, LLC | 52 |
3 |
| OptaSense Holdings Limited | 194 |
3 |
| Voestalpine SIGNALING Siershahn GmbH | 3 |
3 |
| Infineon Technologies AG | 8332 |
2 |
| Alstom Transport Technologies | 121 |
2 |
| Indtact GmbH | 23 |
2 |
| Sirti S.p.A. | 18 |
2 |
| GE Global Sourcing LLC | 879 |
2 |
| Siemens Mobility GmbH | 1805 |
2 |
| Apex Rail Automation | 3 |
2 |
| Other owners | 30 |