- 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: 98
10-year publication summary
|
16
|
8
|
15
|
12
|
4
|
6
|
7
|
3
|
2
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility, Inc. | 354 |
9 |
| Siemens AG | 24461 |
8 |
| Alstom Holdings | 612 |
5 |
| Siemens Industry, Inc. | 1447 |
5 |
| Robel Bahnbaumaschinen GmbH | 116 |
5 |
| General Electric Company | 13808 |
4 |
| BNSF Railway Company | 426 |
4 |
| Thales Management & Services Deutschland GmbH | 62 |
4 |
| KB Signaling Inc. | 101 |
4 |
| Progress Rail Services Corp | 235 |
3 |
| Metrom Rail, LLC | 51 |
3 |
| OptaSense Holdings Limited | 193 |
3 |
| Voestalpine SIGNALING Siershahn GmbH | 3 |
3 |
| Infineon Technologies AG | 8221 |
2 |
| Alstom Transport Technologies | 124 |
2 |
| Sirti S.p.A. | 18 |
2 |
| GE Global Sourcing LLC | 894 |
2 |
| Siemens Mobility GmbH | 1723 |
2 |
| ALSTOM Holdings | 10 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 8735 |
1 |
| Other owners | 25 |