- All sections
- B - Performing operations; transporting
- B61L - Guiding railway traffic; ensuring the safety of railway traffic
- B61L 27/00 - Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
Patent holdings for IPC class B61L 27/00
Total number of patents in this class: 1482
10-year publication summary
|
175
|
172
|
195
|
216
|
152
|
137
|
76
|
43
|
31
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility GmbH | 1641 |
120 |
| Siemens AG | 24575 |
114 |
| Hitachi, Ltd. | 15177 |
82 |
| Mitsubishi Electric Corporation | 44678 |
79 |
| GE Global Sourcing LLC | 909 |
53 |
| BYD Company Limited | 4273 |
33 |
| Casco Signal Co., Ltd. | 117 |
33 |
| General Electric Company | 17801 |
31 |
| Alstom Holdings | 581 |
31 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6218 |
28 |
| Mitsubishi Heavy Industries, Ltd. | 8504 |
27 |
| Transportation IP Holdings, LLC | 901 |
27 |
| Westinghouse Air Brake Technologies Corporation | 513 |
26 |
| Siemens Mobility, Inc. | 342 |
25 |
| Progress Rail Locomotive Inc. | 307 |
19 |
| Crsc Research & Design Institute Group Co., Ltd. | 87 |
16 |
| Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd. | 40 |
15 |
| Amsted Rail Company, Inc. | 437 |
14 |
| Thales Management & Services Deutschland GmbH | 62 |
14 |
| Kyosan Electric Mfg. Co., Ltd. | 168 |
13 |
| Other owners | 682 |