- All sections
- B - Performing operationstransporting
- B61G - Couplings specially adapted for railway vehiclesdraught or buffing appliances specially adapted for railway vehicles
- B61G 9/04 - Draw-gear combined with buffing appliances
Patent holdings for IPC class B61G 9/04
Total number of patents in this class: 81
10-year publication summary
|
9
|
7
|
9
|
17
|
6
|
9
|
5
|
2
|
2
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Miner Enterprises, Inc. | 102 |
11 |
| Dellner Couplers AB | 109 |
7 |
| Strato, Inc. | 22 |
5 |
| Voith Patent GmbH | 2777 |
5 |
| A. Stucki Co. | 73 |
4 |
| CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. | 83 |
4 |
| Strato Technology Solutions, LLC | 31 |
4 |
| CRRC Qingdao Sifang Co., Ltd. | 399 |
3 |
| Qingdao SRI Technology Co., Ltd. | 18 |
3 |
| O-Ring Sales & Service, Inc. | 6 |
3 |
| CRRC Zhuzhou Locomotive Co., Ltd | 264 |
3 |
| Rxd - Research Exchange Development AB | 8 |
3 |
| Amsted Rail Company, Inc. | 429 |
2 |
| Canadian National Railway Company | 147 |
2 |
| Qingdao Sifang Rolling Stock Research Institute Co., Ltd. | 18 |
2 |
| CRRC Qishuyan Institute Co., Ltd. | 57 |
2 |
| Faiveley Transport Schwab AG | 3 |
2 |
| CRRC Changzhou Tech-mark Industrial Co., Ltd. | 23 |
2 |
| Limited Liability Company "industrial Center" | 3 |
2 |
| BYD Company Limited | 6250 |
1 |
| Other owners | 11 |