- All sections
- B - Performing operationstransporting
- B61L - Guiding railway trafficensuring the safety of railway traffic
- B61L 29/28 - Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
Patent holdings for IPC class B61L 29/28
Total number of patents in this class: 96
10-year publication summary
|
8
|
10
|
13
|
13
|
9
|
8
|
6
|
5
|
7
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens Mobility, Inc. | 349 |
25 |
| The Island Radar Company | 14 |
8 |
| C.D.L. Electric Company, Inc. | 33 |
8 |
| BNSF Railway Company | 416 |
4 |
| Wavetrain Systems AS | 12 |
4 |
| KB Signaling Inc. | 100 |
4 |
| Hitachi, Ltd. | 15467 |
3 |
| Siemens Industry, Inc. | 1447 |
3 |
| Railway Equipment Company, Inc. | 35 |
3 |
| Siemens AG | 24525 |
2 |
| Miller Felpax Corporation | 22 |
2 |
| Railway Equipment Company | 2 |
2 |
| GE Global Sourcing LLC | 897 |
2 |
| Cattron North America, Inc. | 140 |
2 |
| Qualcomm Incorporated | 84847 |
1 |
| General Electric Company | 13829 |
1 |
| Siemens Canada Limited | 88 |
1 |
| Mitsubishi Heavy Industries, Ltd. | 8685 |
1 |
| Robert Bosch GmbH | 42614 |
1 |
| Kyocera Corporation | 13758 |
1 |
| Other owners | 18 |