- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 27/20 - Trackside control of safe travel of vehicle or train, e.g. braking curve calculation
Patent holdings for IPC class B61L 27/20
Total number of patents in this class: 187
10-year publication summary
|
1
|
0
|
1
|
6
|
13
|
14
|
29
|
38
|
48
|
39
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility GmbH | 1750 |
21 |
| Casco Signal Ltd. | 59 |
17 |
| Crsc Research & Design Institute Group Co., Ltd. | 134 |
10 |
| BNSF Railway Company | 436 |
9 |
| BYD Company Limited | 5207 |
9 |
| Mitsubishi Electric Corporation | 46590 |
8 |
| Metrom Rail, LLC | 51 |
8 |
| Casco Signal Co., Ltd. | 147 |
8 |
| Transportation IP Holdings, LLC | 939 |
7 |
| Siemens Mobility, Inc. | 362 |
5 |
| Mitsubishi Heavy Industries, Ltd. | 8813 |
4 |
| Progress Rail Services Corp | 236 |
4 |
| Siemens Mobility AG | 14 |
4 |
| Traffic Control Technology Co., Ltd | 31 |
3 |
| GTS Deutschland GmbH | 18 |
3 |
| Crsc Urban Rail Transit Technology Co., Ltd. | 7 |
3 |
| Hitachi, Ltd. | 15599 |
2 |
| Beijing Jiaotong University | 164 |
2 |
| Korea Railroad Research Institute | 177 |
2 |
| National Railroad Passenger Corporation | 126 |
2 |
| Other owners | 56 |