- All sections
- B - Performing operationstransporting
- B61D - Body details or kinds of railway vehicles
- B61D 7/18 - Closure elements for discharge openings pivoted
Patent holdings for IPC class B61D 7/18
Total number of patents in this class: 64
10-year publication summary
|
5
|
4
|
5
|
1
|
6
|
2
|
3
|
2
|
0
|
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 | 151 |
26 |
| CRRC Qiqihar Rolling Stock Co., Ltd. | 111 |
7 |
| JAC Operations, Inc. | 55 |
4 |
| Trinity North American Freight Car, Inc. | 50 |
4 |
| FreightCar America, Inc. | 5 |
3 |
| Miner Enterprises, Inc. | 106 |
3 |
| Powerbrace Corporation | 40 |
3 |
| Trinity Rail Group, LLC | 111 |
3 |
| Herzog Railroad Services, Inc. | 67 |
2 |
| CRRC Yangtze Co., Ltd. | 84 |
2 |
| Chevron Phillips Chemical Company LP | 1843 |
1 |
| CSR Yangtze Co., Ltd. | 25 |
1 |
| Midland Manufacturing Ltd. | 4 |
1 |
| Qiqihar Railway Rolling Stock Co., Ltd. | 45 |
1 |
| Trinity Industries, Inc. | 73 |
1 |
| Railcar Innovations, LLC | 2 |
1 |
| Mineral Resources (equipment) Pty Ltd | 2 |
1 |
| Other owners | 0 |