- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 27/22 - Mineral freed by means not involving slitting by rotary drills with breaking-down means, e.g. wedge-shaped drills
Patent holdings for IPC class E21C 27/22
Total number of patents in this class: 48
10-year publication summary
2
|
5
|
13
|
4
|
5
|
5
|
4
|
2
|
1
|
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 | 348 |
10 |
Sandvik Mining and Construction G.m.b.H. | 91 |
8 |
Caterpillar Global Mining Europe GmbH | 85 |
6 |
Sandvik Intellectual Property AB | 1484 |
4 |
Novamera Inc. | 11 |
4 |
Sandvik Mining and Construction Tools AB | 173 |
3 |
Caterpillar Inc. | 9530 |
1 |
Alliance Coal, LLC | 7 |
1 |
China University of Mining and Technology | 1247 |
1 |
Herrenknecht AG | 203 |
1 |
Joy MM Delaware, Inc. | 56 |
1 |
Northeastern University | 538 |
1 |
Antraquip Corporation | 1 |
1 |
Xuzhou Zhirun Mining Equipment Science and Technology Co., Ltd. | 31 |
1 |
Bucyrus DBT Europe GmbH | 10 |
1 |
AB Sandvik Materials Technology, | 29 |
1 |
Sandvik Powder Solutions AB | 2 |
1 |
Northern Colorado Constructors, Inc. | 3 |
1 |
HE BEI Jing Long Intelligent Equipment Co., Ltd. | 4 |
1 |
Other owners | 0 |