- 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: 583
10-year publication summary
|
42
|
37
|
53
|
68
|
54
|
54
|
41
|
49
|
37
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi, Ltd. | 15572 |
59 |
| Mitsubishi Electric Corporation | 46449 |
28 |
| Westinghouse Air Brake Technologies Corporation | 503 |
20 |
| Siemens AG | 24386 |
19 |
| Casco Signal Co., Ltd. | 147 |
19 |
| Siemens Mobility, Inc. | 361 |
18 |
| Siemens Mobility GmbH | 1742 |
16 |
| BYD Company Limited | 5111 |
14 |
| GE Global Sourcing LLC | 887 |
14 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6272 |
14 |
| Crsc Research & Design Institute Group Co., Ltd. | 134 |
14 |
| Toshiba Infrastructure Systems & Solutions Corporation | 757 |
13 |
| Transportation IP Holdings, LLC | 934 |
13 |
| Hitachi Kokusai Electric Inc. | 874 |
11 |
| Railserve, Inc. | 43 |
10 |
| Hyperloop Technologies, Inc. | 180 |
9 |
| BNSF Railway Company | 435 |
8 |
| Tetra Tech, Inc. | 111 |
8 |
| Universal City Studios LLC | 2590 |
8 |
| KB Signaling Inc. | 100 |
8 |
| Other owners | 260 |