- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 21/10 - Arrangements for trains which are closely following one another
Patent holdings for IPC class B61L 21/10
Total number of patents in this class: 55
10-year publication summary
|
7
|
4
|
11
|
8
|
1
|
5
|
3
|
4
|
2
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| BNSF Railway Company | 421 |
11 |
| Siemens Mobility GmbH | 1720 |
9 |
| Siemens AG | 24484 |
6 |
| Hyperloop Technologies, Inc. | 181 |
5 |
| New York Air Brake LLC | 265 |
3 |
| Toshiba Corporation | 12336 |
2 |
| Siemens Mobility, Inc. | 352 |
2 |
| Alstom Holdings | 612 |
1 |
| Beijing Jiaotong University | 157 |
1 |
| Casco Signal Ltd. | 58 |
1 |
| East Japan Railway Company | 66 |
1 |
| Grappone Technologies Inc. | 1 |
1 |
| SEW-EURODRIVE GmbH & Co. KG | 1954 |
1 |
| Westinghouse Air Brake Technologies Corporation | 503 |
1 |
| Zip Holdings LLC | 7 |
1 |
| Toshiba Infrastructure Systems & Solutions Corporation | 1059 |
1 |
| Toshiba Digital Solutions Corporation | 651 |
1 |
| SSI Schäfer Automation GmbH (DE) | 27 |
1 |
| Traffic Control Technology Co., Ltd | 31 |
1 |
| Ricci Eletrônica Ltda | 1 |
1 |
| Other owners | 4 |