- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 31/02 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
Patent holdings for IPC class E21C 31/02
Total number of patents in this class: 58
10-year publication summary
|
6
|
9
|
6
|
7
|
7
|
5
|
6
|
0
|
3
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Underground Mining LLC | 351 |
14 |
| Sandvik Intellectual Property AB | 1460 |
5 |
| Caterpillar Global Mining Europe GmbH | 85 |
3 |
| BOMAG GmbH | 404 |
3 |
| Shandong University of Science and Technology | 534 |
3 |
| Wirtgen GmbH | 509 |
3 |
| Sany Heavy Equipment Co., Ltd. | 77 |
3 |
| Caterpillar Paving Products Inc. | 677 |
2 |
| China University of Mining and Technology | 1269 |
2 |
| Sandvik Mining and Construction G.m.b.H. | 87 |
2 |
| Sany Heavy Integrated Coal Minging Equipment Co., Ltd | 12 |
2 |
| Shanghai, Tiandi Mining Equipment Technology Co., Ltd | 6 |
2 |
| Caterpillar Inc. | 9706 |
1 |
| Daemo Engineering Co., Ltd. | 33 |
1 |
| Eickhoff Bergbautechnik GmbH | 6 |
1 |
| Nanjing Chervon Industry Co., Ltd. | 1120 |
1 |
| Lloyd Dynamowerke GmbH | 6 |
1 |
| Jiangsu Zhongji Mine Equipment Company Ltd. | 5 |
1 |
| Limited Liability Company "corum Group" | 16 |
1 |
| Yongji Xinshisu Electric Equipment Co., Ltd. | 20 |
1 |
| Other owners | 6 |