- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 3/02 - Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control
Patent holdings for IPC class B61L 3/02
Total number of patents in this class: 35
10-year publication summary
|
6
|
3
|
7
|
2
|
10
|
2
|
1
|
3
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 45646 |
6 |
| GE Global Sourcing LLC | 899 |
5 |
| Siemens Mobility GmbH | 1697 |
3 |
| Transportation IP Holdings, LLC | 924 |
3 |
| Siemens AG | 24562 |
2 |
| Hitachi, Ltd. | 15383 |
2 |
| ABB Schweiz AG | 6865 |
2 |
| 3m Innovative Properties Company | 17856 |
1 |
| Progress Rail Services Corp | 234 |
1 |
| International Electronic Machines Corporation | 110 |
1 |
| L.B. Foster Rail Technologies, Corp. | 15 |
1 |
| Mitsubishi Electric Research Laboratories, Inc. | 1055 |
1 |
| The Nippon Signal Co., Ltd. | 57 |
1 |
| Union Pacific Railroad Company | 67 |
1 |
| Westinghouse Air Brake Technologies Corporation | 504 |
1 |
| SSI Schäfer Automation GmbH (DE) | 27 |
1 |
| Casco Signal Co., Ltd. | 137 |
1 |
| Hitachi Rail GTS Canada Inc. | 66 |
1 |
| KB Signaling Inc. | 100 |
1 |
| Other owners | 0 |