- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 5/00 - Lining shaftsLinings therefor
Patent holdings for IPC class E21D 5/00
Total number of patents in this class: 22
10-year publication summary
|
2
|
2
|
1
|
3
|
0
|
1
|
0
|
2
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hiram (WA) Pty Ltd | 7 |
3 |
| Reline America, Inc. | 7 |
3 |
| Halliburton Energy Services, Inc. | 21125 |
1 |
| Bergteamet AB | 11 |
1 |
| China University of Mining and Technology | 1286 |
1 |
| Herrenknecht AG | 209 |
1 |
| J Walker Concepts LLC | 1 |
1 |
| J.H. Fletcher & Co. | 80 |
1 |
| Tensar Corporation | 8 |
1 |
| University of Science and Technology Beijing | 298 |
1 |
| COREX Plastics (Australia) Pty Ltd | 3 |
1 |
| Rotem Magen Ltd. | 1 |
1 |
| Redpath Deilmann GmbH | 11 |
1 |
| China Coal No.3 Construction Corporation (Group) Ltd | 2 |
1 |
| Hefei Design & Research Institute of Coal Industry Co., Ltd | 2 |
1 |
| Ansteel Group Mining Corportion Limited | 1 |
1 |
| Technicore Underground Inc. | 8 |
1 |
| FCI Holdings Delaware, LLC | 94 |
1 |
| Other owners | 0 |