- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 35/23 - Distribution of spraying-fluids in rotating cutter-heads
Patent holdings for IPC class E21C 35/23
Total number of patents in this class: 13
10-year publication summary
|
3
|
3
|
2
|
1
|
2
|
1
|
2
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| DH Mining System GmbH | 4 |
2 |
| Sandvik Intellectual Property AB | 1543 |
2 |
| Joy Global Underground Mining LLC | 346 |
2 |
| Kennametal Inc. | 1386 |
1 |
| China University of Mining and Technology | 1224 |
1 |
| Southern Engineering Services Pty Ltd | 3 |
1 |
| Joy Global Surface Mining Inc | 359 |
1 |
| Element Six (UK) Limited | 203 |
1 |
| Bumech S.A. | 1 |
1 |
| Michamvi Marketing (Pty) Limited | 1 |
1 |
| Other owners | 0 |