- All sections
- B - Performing operations; transporting
- B61L - Guiding railway traffic; ensuring the safety of railway traffic
- B61L 23/34 - Control, warning or like safety means along the route or between vehicles or vehicle trains for indicating the distance between vehicles or vehicle trains by the transmission of signals therebetween
Patent holdings for IPC class B61L 23/34
Total number of patents in this class: 210
10-year publication summary
|
30
|
7
|
30
|
26
|
21
|
18
|
17
|
17
|
9
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Harsco Technologies LLC | 151 |
11 |
| Siemens AG | 24575 |
10 |
| BNSF Railway Company | 368 |
10 |
| Siemens Mobility GmbH | 1641 |
10 |
| Railserve, Inc. | 31 |
9 |
| Hyperloop Technologies, Inc. | 182 |
8 |
| Mitsubishi Electric Corporation | 44678 |
7 |
| GE Global Sourcing LLC | 909 |
7 |
| Transportation IP Holdings, LLC | 901 |
7 |
| Metrom Rail, LLC | 50 |
6 |
| Westinghouse Air Brake Technologies Corporation | 513 |
6 |
| Siemens Mobility, Inc. | 342 |
5 |
| Hitachi, Ltd. | 15177 |
4 |
| Rockwell Automation Technologies, Inc. | 2651 |
4 |
| Scania CV AB | 2376 |
4 |
| STC, Inc. | 52 |
4 |
| Traffic Control Technology Co., Ltd | 31 |
4 |
| Ground Transportation Systems Canada Inc. | 58 |
4 |
| Thales Canada Inc. | 107 |
3 |
| Miller Felpax Corporation | 21 |
3 |
| Other owners | 84 |