- 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: 1498
10-year publication summary
|
171
|
170
|
195
|
213
|
151
|
127
|
70
|
37
|
30
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility GmbH | 1772 |
121 |
| Siemens AG | 24333 |
112 |
| Hitachi, Ltd. | 15712 |
82 |
| Mitsubishi Electric Corporation | 46973 |
78 |
| GE Global Sourcing LLC | 885 |
53 |
| Casco Signal Co., Ltd. | 151 |
41 |
| BYD Company Limited | 5510 |
35 |
| General Electric Company | 13830 |
30 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6233 |
28 |
| Mitsubishi Heavy Industries, Ltd. | 8900 |
27 |
| Westinghouse Air Brake Technologies Corporation | 502 |
25 |
| Transportation IP Holdings, LLC | 945 |
24 |
| Siemens Mobility, Inc. | 366 |
23 |
| Alstom Holdings | 624 |
20 |
| Progress Rail Locomotive Inc. | 323 |
19 |
| Crsc Research & Design Institute Group Co., Ltd. | 148 |
19 |
| Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd. | 40 |
15 |
| Thales Management & Services Deutschland GmbH | 62 |
14 |
| Kyosan Electric Mfg. Co., Ltd. | 176 |
13 |
| Konux GmbH | 32 |
13 |
| Other owners | 706 |