- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 21/08 - Order transmission and reception arrangements for giving or withholding permission
Patent holdings for IPC class B61L 21/08
Total number of patents in this class: 9
10-year publication summary
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0
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1
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1
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1
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0
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1
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0
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0
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1
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2
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| BNSF Railway Company | 436 |
3 |
| BYD Company Limited | 5207 |
2 |
| Siemens AG | 24353 |
1 |
| Mitsubishi Heavy Industries, Ltd. | 8813 |
1 |
| Hitachi, Ltd. | 15599 |
1 |
| Alstom Holdings | 614 |
1 |
| Other owners | 0 |