- All sections
- B - Performing operations; transporting
- B61L - Guiding railway traffic; ensuring the safety of railway traffic
- B61L 23/06 - Control, warning or like safety means along the route or between vehicles or vehicle trains for warning men working on the route
Patent holdings for IPC class B61L 23/06
Total number of patents in this class: 139
10-year publication summary
|
17
|
14
|
17
|
8
|
21
|
18
|
7
|
13
|
11
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Harsco Technologies LLC | 151 |
22 |
| Metrom Rail, LLC | 50 |
14 |
| STC, Inc. | 52 |
8 |
| Siemens AG | 24575 |
6 |
| Miller Felpax Corporation | 21 |
6 |
| Railware, Inc. | 5 |
4 |
| Mitsubishi Electric Corporation | 44678 |
3 |
| BNSF Railway Company | 368 |
3 |
| Bombardier Transportation GmbH | 659 |
3 |
| Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft m.b.H. | 405 |
3 |
| Railserve, Inc. | 31 |
3 |
| Westinghouse Air Brake Technologies Corporation | 513 |
3 |
| Transportation IP Holdings, LLC | 901 |
3 |
| Hitachi, Ltd. | 15177 |
2 |
| Thales Canada Inc. | 107 |
2 |
| CSX Transportation, Inc. | 7 |
2 |
| Willowglen Systems Inc. | 12 |
2 |
| Cattron North America, Inc. | 140 |
2 |
| Siemens Mobility Limited | 35 |
2 |
| RailPros Field Services, Inc. | 9 |
2 |
| Other owners | 44 |