- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 15/00 - PropsChocks
Patent holdings for IPC class E21D 15/00
Total number of patents in this class: 30
10-year publication summary
|
2
|
5
|
5
|
1
|
4
|
1
|
0
|
1
|
0
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Micon | 13 |
5 |
| China University of Mining and Technology | 1268 |
3 |
| FCI Holdings Delaware, LLC | 87 |
3 |
| FCI Holdings Delaware, Inc. | 57 |
2 |
| Saltus Poles CC | 2 |
2 |
| CrossCut Enterprises LLC | 2 |
2 |
| Manchao He | 4 |
2 |
| J.H. Fletcher & Co. | 79 |
1 |
| MTI Group Pty Ltd | 37 |
1 |
| Sturda, Inc. | 4 |
1 |
| Tiefenbach Control Systems GmbH | 18 |
1 |
| MMC Innovations LLP | 4 |
1 |
| Underground Extraction Technologies Pty Ltd | 17 |
1 |
| Setevox (Pty) Ltd | 3 |
1 |
| Xuzhou Goldfluid Hydraulic Technology Development Co., Ltd. | 19 |
1 |
| Ausyan Pty Ltd | 1 |
1 |
| Ningbo Yonggong Technology Co., Ltd. | 3 |
1 |
| MSP Mine Support Products (Pty) Ltd | 3 |
1 |
| Other owners | 0 |