- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 15/02 - Non-telescopic props
Patent holdings for IPC class E21D 15/02
Total number of patents in this class: 12
10-year publication summary
|
0
|
1
|
1
|
1
|
3
|
4
|
0
|
1
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| China University of Mining and Technology | 1224 |
2 |
| Instytut Formy Sp. z o.o. | 5 |
2 |
| Cleveland Reclaim Industries, Inc. | 41 |
1 |
| FCI Holdings Delaware, Inc. | 150 |
1 |
| Micon | 13 |
1 |
| Shandong University of Science and Technology | 499 |
1 |
| Setevox (Pty) Ltd | 3 |
1 |
| Zieta Prozessdesign Sp. z o.o. | 25 |
1 |
| CrossCut Enterprises LLC | 2 |
1 |
| Manchao He | 4 |
1 |
| Other owners | 0 |