- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 23/08 - Advancing mechanisms
Patent holdings for IPC class E21D 23/08
Total number of patents in this class: 15
10-year publication summary
|
0
|
4
|
0
|
0
|
3
|
1
|
1
|
0
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Intellectual Property AB | 1546 |
3 |
| Caterpillar Inc. | 9149 |
2 |
| Caterpillar Global Mining Europe GmbH | 85 |
1 |
| Bucyrus Europe GmbH | 32 |
1 |
| China University of Mining and Technology | 1220 |
1 |
| Cougar Can Company Pty Ltd. | 3 |
1 |
| Lumb, Hilary Leith | 2 |
1 |
| Morgan, James Edward | 2 |
1 |
| Morgan, Leith NORMA | 2 |
1 |
| China Mining & Civil New Material Science and Technology Ltd. | 11 |
1 |
| Limited Liability Company "corum Group" | 16 |
1 |
| Nepean Longwall Pty Ltd | 1 |
1 |
| Other owners | 0 |