- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 23/00 - Control, warning or like safety means along the route or between vehicles or trains
Patent holdings for IPC class B61L 23/00
Total number of patents in this class: 576
10-year publication summary
|
51
|
41
|
57
|
70
|
61
|
56
|
41
|
51
|
39
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi, Ltd. | 15449 |
59 |
| Mitsubishi Electric Corporation | 45860 |
28 |
| Westinghouse Air Brake Technologies Corporation | 504 |
20 |
| Siemens AG | 24547 |
19 |
| Siemens Mobility, Inc. | 347 |
18 |
| Casco Signal Co., Ltd. | 141 |
18 |
| Siemens Mobility GmbH | 1703 |
15 |
| BYD Company Limited | 4821 |
14 |
| GE Global Sourcing LLC | 899 |
14 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6269 |
14 |
| Toshiba Infrastructure Systems & Solutions Corporation | 1053 |
13 |
| Transportation IP Holdings, LLC | 928 |
13 |
| Hitachi Kokusai Electric Inc. | 882 |
11 |
| Crsc Research & Design Institute Group Co., Ltd. | 99 |
10 |
| Hyperloop Technologies, Inc. | 182 |
9 |
| Railserve, Inc. | 41 |
9 |
| BNSF Railway Company | 413 |
8 |
| Tetra Tech, Inc. | 111 |
8 |
| Universal City Studios LLC | 2504 |
8 |
| KB Signaling Inc. | 100 |
8 |
| Other owners | 260 |