- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 15/48 - Chocks or the like
Patent holdings for IPC class E21D 15/48
Total number of patents in this class: 30
10-year publication summary
|
4
|
0
|
1
|
4
|
1
|
1
|
1
|
1
|
4
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FCI Holdings Delaware, LLC | 99 |
5 |
| Micon | 12 |
3 |
| ABC Industries, Inc. | 45 |
2 |
| China University of Mining and Technology | 1292 |
2 |
| Cougar Can Company Pty Ltd. | 3 |
2 |
| DSI Underground Australia Pty Limited | 14 |
2 |
| Burrell Mining Products, Inc. | 5 |
1 |
| Cleveland Reclaim Industries, Inc. | 45 |
1 |
| Mine Support Products (Pty) Ltd | 2 |
1 |
| Timrite (Pty) Ltd. | 2 |
1 |
| University of Maine System Board of Trustees | 277 |
1 |
| CrossCut Enterprises LLC | 2 |
1 |
| Ausyan Pty Ltd | 1 |
1 |
| Hoan Holdings Pty Ltd | 1 |
1 |
| Rzt Zelpy 5260 (Proprietary) Limited | 1 |
1 |
| "dsi Schaum Chemie" Spolka z ograniczona odpowiedzialnoscia | 1 |
1 |
| Xinjiang Institute of Engineering | 4 |
1 |
| Guoneng Mengxi Coal Chemical Co., LTD | 1 |
1 |
| Mine Timber Technology (Int) Pty Ltd | 1 |
1 |
| Chowzaco Pty Limited | 1 |
1 |
| Other owners | 0 |