- 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 5/52 - Bogie frames
Patent holdings for IPC class B61F 5/52
Total number of patents in this class: 361
10-year publication summary
|
25
|
20
|
40
|
61
|
36
|
33
|
37
|
18
|
17
|
12
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| CRRC Tangshan Co., Ltd. | 255 |
30 |
| Kawasaki Railcar Manufacturing Co., Ltd. | 180 |
28 |
| Kawasaki Jukogyo Kabushiki Kaisha (trading as Kawasaki Heavy Industries, Ltd.) | 3090 |
23 |
| BYD Company Limited | 4958 |
22 |
| CRRC Qingdao Sifang Co., Ltd. | 381 |
22 |
| Amsted Rail Company, Inc. | 432 |
18 |
| Siemens Mobility Austria GmbH | 165 |
17 |
| Bombardier Transportation GmbH | 647 |
16 |
| Nevis Industries LLC | 63 |
13 |
| CRRC Zhuzhou Locomotive Co., Ltd | 250 |
11 |
| Siemens AG Österreich | 316 |
10 |
| Alstom Holdings | 610 |
8 |
| Transportation IP Holdings, LLC | 931 |
7 |
| CRRC Yangtze Co., Ltd. | 84 |
6 |
| CRRC Changchun Railway Vehicles Co., Ltd. | 243 |
6 |
| CRRC Nanjing Puzhen Co., Ltd. | 100 |
6 |
| Hitachi, Ltd. | 15459 |
5 |
| Electro-Motive Diesel, Inc. | 72 |
5 |
| National Steel Car Limited | 150 |
5 |
| Nippon Steel Corporation | 6207 |
5 |
| Other owners | 98 |