- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 11/00 - Lining tunnels, galleries or other underground cavities, e.g. large underground chambersLinings thereforMaking such linings in situ, e.g. by assembling
Patent holdings for IPC class E21D 11/00
Total number of patents in this class: 200
10-year publication summary
|
16
|
17
|
12
|
15
|
25
|
20
|
17
|
7
|
17
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Shandong University | 1020 |
6 |
| Foamrox AS | 9 |
6 |
| Sandvik Mining and Construction Oy | 811 |
5 |
| LMK Technologies, LLC | 102 |
4 |
| Tensar Corporation, LLC | 15 |
4 |
| NEC Corporation | 35351 |
3 |
| FCI Holdings Delaware, Inc. | 60 |
3 |
| Geobrugg AG | 102 |
3 |
| JX Nippon Oil & Energy Corporation | 999 |
3 |
| Reline America, Inc. | 7 |
3 |
| Sandvik Intellectual Property AB | 1495 |
3 |
| Shandong University of Science and Technology | 506 |
3 |
| Tensar Corporation | 8 |
3 |
| University of Science and Technology Beijing | 277 |
3 |
| Electricwaze LLC | 13 |
3 |
| Garibaldi S.A. | 7 |
3 |
| Technicore Underground Inc. | 8 |
3 |
| ABB Inc. | 18 |
2 |
| Ashimori Engineering Co., Ltd. | 4 |
2 |
| Ashimori Industry Co., Ltd. | 262 |
2 |
| Other owners | 133 |