- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 27/02 - Machines which completely free the mineral from the seam solely by slitting
Patent holdings for IPC class E21C 27/02
Total number of patents in this class: 57
10-year publication summary
|
14
|
6
|
4
|
8
|
5
|
2
|
3
|
1
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Underground Mining LLC | 350 |
24 |
| Caterpillar Inc. | 9983 |
5 |
| Caterpillar Global Mining Europe GmbH | 85 |
5 |
| Continental Global Material Handling Inc. | 23 |
4 |
| Continental Global Material Handling LLC | 25 |
4 |
| Conveyor Manufacturers Australia Pty Ltd | 7 |
2 |
| Particular Engineering Pty Ltd | 2 |
2 |
| DH Mining System GmbH | 4 |
1 |
| Eickhoff Bergbautechnik GmbH | 6 |
1 |
| Shandong University of Science and Technology | 538 |
1 |
| Solvay Chemicals, Inc. | 19 |
1 |
| Taiyuan University of Technology | 279 |
1 |
| Kopex Machinery Spółka Akcyjna | 4 |
1 |
| Limited Liability Company "corum Group" | 16 |
1 |
| Xi'an University of Science and Technology | 12 |
1 |
| Yimin Zhang | 2 |
1 |
| Joy Global Underground Mining Inc | 3 |
1 |
| Grenevia S.A. | 2 |
1 |
| Other owners | 0 |