- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 27/00 - Central railway traffic control systemsTrackside controlCommunication systems specially adapted therefor
Patent holdings for IPC class B61L 27/00
Total number of patents in this class: 1494
10-year publication summary
|
174
|
195
|
215
|
152
|
134
|
74
|
42
|
33
|
20
|
11
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility GmbH | 1839 |
122 |
| Siemens AG | 24199 |
110 |
| Hitachi, Ltd. | 15904 |
82 |
| Mitsubishi Electric Corporation | 47625 |
78 |
| GE Global Sourcing LLC | 866 |
47 |
| Casco Signal Co., Ltd. | 173 |
43 |
| BYD Company Limited | 6250 |
36 |
| General Electric Company | 13806 |
28 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6207 |
28 |
| Mitsubishi Heavy Industries, Ltd. | 9023 |
27 |
| Westinghouse Air Brake Technologies Corporation | 490 |
24 |
| Transportation IP Holdings, LLC | 975 |
24 |
| Siemens Mobility, Inc. | 374 |
23 |
| Crsc Research & Design Institute Group Co., Ltd. | 158 |
20 |
| Alstom Holdings | 624 |
19 |
| Progress Rail Locomotive Inc. | 332 |
19 |
| BNSF Railway Company | 517 |
15 |
| Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd. | 40 |
15 |
| Thales Management & Services Deutschland GmbH | 62 |
14 |
| KB Signaling Inc. | 121 |
14 |
| Other owners | 706 |