- 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: 593
10-year publication summary
|
37
|
53
|
68
|
54
|
54
|
42
|
50
|
37
|
26
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi, Ltd. | 15819 |
62 |
| Mitsubishi Electric Corporation | 47380 |
30 |
| Westinghouse Air Brake Technologies Corporation | 498 |
20 |
| Casco Signal Co., Ltd. | 158 |
20 |
| Siemens AG | 24291 |
18 |
| Siemens Mobility, Inc. | 368 |
18 |
| Siemens Mobility GmbH | 1800 |
17 |
| BYD Company Limited | 5944 |
15 |
| GE Global Sourcing LLC | 881 |
14 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6221 |
14 |
| Crsc Research & Design Institute Group Co., Ltd. | 154 |
14 |
| Toshiba Infrastructure Systems & Solutions Corporation | 699 |
13 |
| Transportation IP Holdings, LLC | 957 |
13 |
| Hitachi Kokusai Electric Inc. | 853 |
11 |
| BNSF Railway Company | 492 |
9 |
| Railserve, Inc. | 51 |
9 |
| KB Signaling Inc. | 119 |
9 |
| Tetra Tech, Inc. | 107 |
8 |
| Universal City Studios LLC | 2740 |
8 |
| NEC Corporation | 36464 |
7 |
| Other owners | 264 |