- All sections
- B - Performing operationstransporting
- B61F - Rail vehicle suspensions, e.g. underframes, bogies or arrangements of wheel axlesrail vehicles for use on tracks of different widthpreventing derailing of rail vehicleswheel guards, obstruction removers or the like for rail vehicles
- B61F 5/04 - Bolster supports or mountings
Patent holdings for IPC class B61F 5/04
Total number of patents in this class: 85
10-year publication summary
|
11
|
9
|
15
|
10
|
6
|
6
|
2
|
0
|
2
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Amsted Rail Company, Inc. | 412 |
12 |
| CRRC Tangshan Co., Ltd. | 282 |
8 |
| National Steel Car Limited | 145 |
7 |
| Kawasaki Railcar Manufacturing Co., Ltd. | 186 |
6 |
| Nevis Industries LLC | 64 |
5 |
| CRRC Yangtze Co., Ltd. | 84 |
4 |
| CRRC Qingdao Sifang Co., Ltd. | 410 |
3 |
| CSR Yangtze Co., Ltd. | 25 |
3 |
| Standard Car Truck Company | 16 |
3 |
| Transportation IP Holdings, LLC | 1009 |
3 |
| Hitachi, Ltd. | 16206 |
2 |
| Alstom Holdings | 630 |
2 |
| Bombardier Transportation GmbH | 559 |
2 |
| Qiqihar Railway Rolling Stock Co., Ltd. | 45 |
2 |
| CRRC Meishan Co., Ltd. | 27 |
2 |
| Qiqihar Railway Rolling Stock Co.,Ltd. Dalian R&D Centre | 10 |
2 |
| Science and Technology Development Branch, CRRC Yangtze Group Co., Ltd. | 11 |
2 |
| Caterpillar Inc. | 10316 |
1 |
| CRRC Qiqihar Rolling Stock Co., Ltd. | 117 |
1 |
| CSR Nanjing Puzhen Co., Ltd. | 2 |
1 |
| Other owners | 14 |