- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 11/15 - Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
Patent holdings for IPC class E21D 11/15
Total number of patents in this class: 93
10-year publication summary
|
5
|
8
|
11
|
11
|
7
|
7
|
8
|
10
|
9
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NV Bekaert SA | 758 |
9 |
| Geobrugg AG | 102 |
7 |
| Sandvik Intellectual Property AB | 1546 |
5 |
| Sandvik Mining and Construction Oy | 784 |
5 |
| Inchalam SA - Industrias Chilenas de Alambre | 13 |
5 |
| Tensar Corporation, LLC | 15 |
3 |
| China University of Mining and Technology | 1220 |
2 |
| Herrenknecht AG | 195 |
2 |
| REI, Inc. | 23 |
2 |
| Rock Engineering (Aust) Pty Ltd. | 3 |
2 |
| Thermal Ceramics de France | 2 |
2 |
| Garibaldi S.A. | 8 |
2 |
| E. I. du Pont de Nemours and Company | 4253 |
1 |
| Nippon Telegraph and Telephone Corporation | 16200 |
1 |
| 1311854 Ontario Limited | 19 |
1 |
| AIL International Inc. | 66 |
1 |
| Belgo Bekaert Arames Ltda | 4 |
1 |
| China University of Mining and Technology, Beijing | 79 |
1 |
| Contech Engineered Solutions LLC | 216 |
1 |
| FCI Holdings Delaware, Inc. | 151 |
1 |
| Other owners | 39 |