- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 27/33 - Backup systems, e.g. switching when failures occur
Patent holdings for IPC class B61L 27/33
Total number of patents in this class: 16
10-year publication summary
|
0
|
0
|
0
|
0
|
2
|
3
|
0
|
5
|
5
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi, Ltd. | 15920 |
2 |
| Parallel Systems, Inc. | 40 |
2 |
| Casco Signal Co., Ltd. | 176 |
2 |
| Mitsubishi Electric Corporation | 47683 |
1 |
| BYD Company Limited | 6271 |
1 |
| International Electronic Machines Corporation | 104 |
1 |
| ARUP Ventures Limited | 7 |
1 |
| Siemens Mobility GmbH | 1844 |
1 |
| Cattron North America, Inc. | 145 |
1 |
| Acorn Technology Systems, Inc. | 4 |
1 |
| voestalpine Signaling Poland Sp. z o. o. | 5 |
1 |
| Shanghai Fuxin Intelligent Transportation Solutions Co., Ltd. | 6 |
1 |
| Silex Ipari Automatizálási Zrt. | 1 |
1 |
| Other owners | 0 |