- 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: 57
10-year publication summary
|
7
|
9
|
6
|
10
|
7
|
5
|
6
|
0
|
2
|
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 | 347 |
13 |
| Sandvik Intellectual Property AB | 1492 |
5 |
| Caterpillar Global Mining Europe GmbH | 85 |
3 |
| BOMAG GmbH | 401 |
3 |
| Shandong University of Science and Technology | 506 |
3 |
| Wirtgen GmbH | 501 |
3 |
| Sany Heavy Equipment Co., Ltd. | 69 |
3 |
| Caterpillar Paving Products Inc. | 668 |
2 |
| China University of Mining and Technology | 1245 |
2 |
| Sandvik Mining and Construction G.m.b.H. | 91 |
2 |
| Sany Heavy Integrated Coal Minging Equipment Co., Ltd | 12 |
2 |
| Shanghai, Tiandi Mining Equipment Technology Co., Ltd | 6 |
2 |
| Caterpillar Inc. | 9509 |
1 |
| Daemo Engineering Co., Ltd. | 30 |
1 |
| Eickhoff Bergbautechnik GmbH | 6 |
1 |
| Nanjing Chervon Industry Co., Ltd. | 1035 |
1 |
| Lloyd Dynamowerke GmbH | 6 |
1 |
| Jiangsu Zhongji Mine Equipment Company Ltd. | 4 |
1 |
| Limited Liability Company "corum Group" | 16 |
1 |
| Yongji Xinshisu Electric Equipment Co., Ltd. | 20 |
1 |
| Other owners | 6 |