- All sections
- B - Performing operationstransporting
- B61D - Body details or kinds of railway vehicles
- B61D 7/28 - Opening or closing means hydraulic or pneumatic
Patent holdings for IPC class B61D 7/28
Total number of patents in this class: 66
10-year publication summary
|
5
|
3
|
7
|
4
|
7
|
6
|
4
|
6
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| National Steel Car Limited | 150 |
11 |
| Trinity Rail Group, LLC | 111 |
9 |
| CRRC Qiqihar Rolling Stock Co., Ltd. | 111 |
7 |
| JAC Operations, Inc. | 52 |
4 |
| CRRC Yangtze Co., Ltd. | 84 |
4 |
| Miner Enterprises, Inc. | 107 |
3 |
| Powerbrace Corporation | 40 |
3 |
| Qiqihar Railway Rolling Stock Co., Ltd. | 45 |
3 |
| Trinity Industries, Inc. | 73 |
3 |
| A. Stucki Co. | 56 |
2 |
| CSR Yangtze Co., Ltd. | 25 |
2 |
| Ecofab Covers International Inc. | 32 |
2 |
| Herzog Railroad Services, Inc. | 61 |
2 |
| Trinity North American Freight Car, Inc. | 50 |
2 |
| Aventics Corporation | 26 |
1 |
| Minetec S.A. | 30 |
1 |
| Wilson Trailer Company | 10 |
1 |
| Railcar Innovations, LLC | 2 |
1 |
| Greenbrier Central, LLC | 16 |
1 |
| Novium | 2 |
1 |
| Other owners | 3 |