- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 11/00 - Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
Patent holdings for IPC class E21D 11/00
Total number of patents in this class: 190
10-year publication summary
|
12
|
16
|
17
|
12
|
15
|
25
|
20
|
17
|
7
|
3
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Foamrox AS | 9 |
6 |
| FCI Holdings Delaware, Inc. | 158 |
5 |
| Shandong University | 886 |
5 |
| LMK Technologies, LLC | 114 |
4 |
| 3m Innovative Properties Company | 18406 |
3 |
| NEC Corporation | 32703 |
3 |
| Geobrugg AG | 100 |
3 |
| JX Nippon Oil & Energy Corporation | 1019 |
3 |
| Reline America, Inc. | 7 |
3 |
| Sandvik Intellectual Property AB | 1634 |
3 |
| Shandong University of Science and Technology | 459 |
3 |
| Tensar Corporation | 11 |
3 |
| Tensar Corporation, LLC | 13 |
3 |
| University of Science and Technology Beijing | 245 |
3 |
| Garibaldi S.A. | 8 |
3 |
| ABB Inc. | 18 |
2 |
| Ashimori Engineering Co., Ltd. | 6 |
2 |
| Ashimori Industry Co., Ltd. | 264 |
2 |
| Centre for Excellence in Mining Innovation | 5 |
2 |
| Construction Research & Technology GmbH | 640 |
2 |
| Other owners | 127 |