- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 25/04 - Indicating or recording train identities
Patent holdings for IPC class B61L 25/04
Total number of patents in this class: 245
10-year publication summary
|
19
|
19
|
28
|
24
|
23
|
35
|
18
|
14
|
15
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Electric Corporation | 46249 |
26 |
| Hitachi, Ltd. | 15521 |
23 |
| Hitachi Kokusai Electric Inc. | 875 |
10 |
| Siemens Mobility GmbH | 1724 |
7 |
| Harsco Technologies LLC | 147 |
6 |
| Westinghouse Air Brake Technologies Corporation | 503 |
6 |
| Amsted Rail Company, Inc. | 439 |
5 |
| Toshiba Infrastructure Systems & Solutions Corporation | 1006 |
5 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6274 |
5 |
| Transportation IP Holdings, LLC | 932 |
5 |
| NEC Corporation | 35793 |
4 |
| BYD Company Limited | 5035 |
4 |
| Korea Railroad Research Institute | 177 |
4 |
| Siemens Mobility, Inc. | 360 |
4 |
| Konux GmbH | 32 |
4 |
| Acorn Technology Systems, Inc. | 4 |
4 |
| Siemens AG | 24437 |
3 |
| Toshiba Corporation | 12376 |
3 |
| Rockwell Automation Technologies, Inc. | 2729 |
3 |
| Casco Signal Ltd. | 59 |
3 |
| Other owners | 111 |