- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 23/22 - Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in two directions over the same pair of rails
Patent holdings for IPC class B61L 23/22
Total number of patents in this class: 18
10-year publication summary
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0
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2
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2
|
1
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3
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0
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1
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1
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2
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility GmbH | 1878 |
4 |
| Hitachi, Ltd. | 16146 |
2 |
| Siemens AG | 24011 |
1 |
| Toyota Motor Corporation | 35857 |
1 |
| Raytheon Company | 8443 |
1 |
| BYD Company Limited | 6495 |
1 |
| Carnegie Mellon University | 1630 |
1 |
| Parallel Systems, Inc. | 40 |
1 |
| Technological Resources Pty. Limited | 442 |
1 |
| Westinghouse Air Brake Technologies Corporation | 487 |
1 |
| Qun Zhou | 1 |
1 |
| Shu Tong Chu | 1 |
1 |
| Transportation IP Holdings, LLC | 1001 |
1 |
| China Railway Baoji Bridge Group Co., Ltd | 13 |
1 |
| Other owners | 0 |