- All sections
- B - Performing operations; transporting
- B61G - Couplings specially adapted for railway vehicles; draught 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: 77
10-year publication summary
|
6
|
9
|
7
|
9
|
17
|
6
|
8
|
4
|
2
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Miner Enterprises, Inc. | 107 |
11 |
| Strato, Inc. | 60 |
9 |
| Dellner Couplers AB | 101 |
7 |
| Voith Patent GmbH | 2736 |
5 |
| CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd. | 84 |
4 |
| A. Stucki Co. | 47 |
3 |
| CRRC Qingdao Sifang Co., Ltd. | 372 |
3 |
| Qingdao SRI Technology Co., Ltd. | 18 |
3 |
| O-Ring Sales & Service, Inc. | 6 |
3 |
| CRRC Zhuzhou Locomotive Co., Ltd | 235 |
3 |
| Rxd - Research Exchange Development AB | 6 |
3 |
| Amsted Rail Company, Inc. | 436 |
2 |
| Canadian National Railway Company | 155 |
2 |
| Qingdao Sifang Rolling Stock Research Institute Co., Ltd. | 18 |
2 |
| CRRC Qishuyan Institute Co., Ltd. | 54 |
2 |
| CRRC Changzhou Tech-mark Industrial Co., Ltd. | 23 |
2 |
| BYD Company Limited | 4320 |
1 |
| Korea Railroad Research Institute | 174 |
1 |
| Trinity North American Freight Car, Inc. | 50 |
1 |
| Ross Equipment Australia | 2 |
1 |
| Other owners | 9 |