- All sections
- B - Performing operations; transporting
- B61L - Guiding railway traffic; ensuring the safety of railway traffic
- B61L 1/18 - Railway track circuits
Patent holdings for IPC class B61L 1/18
Total number of patents in this class: 190
10-year publication summary
|
11
|
11
|
31
|
20
|
7
|
14
|
18
|
10
|
9
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility, Inc. | 341 |
19 |
| Siemens AG | 24565 |
16 |
| KB Signaling Inc. | 101 |
15 |
| BNSF Railway Company | 370 |
13 |
| Alstom Holdings | 510 |
10 |
| General Electric Company | 17789 |
8 |
| Siemens Mobility GmbH | 1644 |
7 |
| Siemens Industry, Inc. | 1430 |
6 |
| Alstom Transport Technologies | 264 |
6 |
| GE Global Sourcing LLC | 909 |
5 |
| Mitsubishi Electric Corporation | 44851 |
4 |
| Kyosan Electric Mfg. Co., Ltd. | 170 |
4 |
| C.D.L. Electric Company, Inc. | 33 |
4 |
| Sirti S.p.A. | 18 |
3 |
| Transportation IP Holdings, LLC | 906 |
3 |
| Hitachi, Ltd. | 15226 |
2 |
| Athena Industrial Technologies Inc. | 17 |
2 |
| East Japan Railway Company | 62 |
2 |
| L.B. Foster Company | 52 |
2 |
| Mitsubishi Electric Research Laboratories, Inc. | 1040 |
2 |
| Other owners | 57 |