- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 31/12 - Component parts
Patent holdings for IPC class E21C 31/12
Total number of patents in this class: 34
10-year publication summary
|
4
|
1
|
9
|
1
|
4
|
2
|
1
|
1
|
0
|
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 |
19 |
| Caterpillar Global Mining Europe GmbH | 85 |
4 |
| Caterpillar Inc. | 9539 |
3 |
| GE Global Sourcing LLC | 895 |
2 |
| BOMAG GmbH | 402 |
1 |
| Joy MM Delaware, Inc. | 56 |
1 |
| Yancoal Technology Development PTY Ltd | 1 |
1 |
| Limited Liability Company "corum Group" | 16 |
1 |
| Yimin Zhang | 2 |
1 |
| Gainwell Engineering Global Pte. Ltd. | 11 |
1 |
| Other owners | 0 |