- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 35/22 - Equipment for preventing the formation of, or for removal of, dust
Patent holdings for IPC class E21C 35/22
Total number of patents in this class: 61
10-year publication summary
|
6
|
6
|
2
|
4
|
5
|
6
|
8
|
3
|
2
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Underground Mining LLC | 331 |
6 |
| Sandvik Intellectual Property AB | 1634 |
5 |
| BOMAG GmbH | 405 |
3 |
| CFT GmbH Compact Filter Technic | 9 |
3 |
| Sandvik Mining and Construction G.m.b.H. | 85 |
3 |
| Shandong University of Science and Technology | 459 |
3 |
| Komatsu Ltd. | 4265 |
2 |
| Kennametal Inc. | 1380 |
2 |
| Anhui University of Science and Technology | 156 |
2 |
| Caterpillar Paving Products Inc. | 628 |
2 |
| Vermeer Manufacturing Company | 615 |
2 |
| Wirtgen GmbH | 507 |
2 |
| Newcrest Mining Limited | 38 |
2 |
| PingAn Coal Mining Engineering Research Institute Co. , Ltd | 4 |
2 |
| Caterpillar Global Mining LLC | 199 |
1 |
| Englo, Inc. | 2 |
1 |
| GMS Mine Repair and Maintenance, Inc. | 3 |
1 |
| Joy MM Delaware, Inc. | 58 |
1 |
| Montall Holdings Pty Ltd | 1 |
1 |
| San Juan Coal Company | 2 |
1 |
| Other owners | 16 |