- All sections
- B - Performing operationstransporting
- B61D - Body details or kinds of railway vehicles
- B61D 7/20 - Closure elements for discharge openings sliding
Patent holdings for IPC class B61D 7/20
Total number of patents in this class: 43
10-year publication summary
|
2
|
3
|
10
|
3
|
2
|
0
|
4
|
5
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Miner Enterprises, Inc. | 107 |
10 |
| Powerbrace Corporation | 40 |
10 |
| Trinity Rail Group, LLC | 111 |
5 |
| Aero Transportation Products, Inc. | 9 |
4 |
| Trinity Industries, Inc. | 73 |
3 |
| A. Stucki Co. | 56 |
2 |
| Nordic Minesteel Technologies Inc. | 36 |
2 |
| Herzog Railroad Services, Inc. | 61 |
1 |
| National Steel Car Limited | 150 |
1 |
| Trinity North American Freight Car, Inc. | 50 |
1 |
| Wilson Trailer Company | 10 |
1 |
| Railcar Innovations, LLC | 2 |
1 |
| Greenbrier Central, LLC | 16 |
1 |
| Hermanns Silo GmbH | 3 |
1 |
| Other owners | 0 |