- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 11/15 - Plate liningsLaggings, 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: 100
10-year publication summary
|
5
|
8
|
11
|
11
|
7
|
7
|
8
|
12
|
9
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NV Bekaert SA | 747 |
9 |
| Geobrugg AG | 103 |
8 |
| Sandvik Intellectual Property AB | 1484 |
5 |
| Sandvik Mining and Construction Oy | 827 |
5 |
| Inchalam SA - Industrias Chilenas de Alambre | 13 |
5 |
| Tensar Corporation, LLC | 15 |
3 |
| AIL International Inc. | 66 |
2 |
| China University of Mining and Technology | 1253 |
2 |
| Herrenknecht AG | 203 |
2 |
| REI, Inc. | 23 |
2 |
| Rock Engineering (Aust) Pty Ltd. | 3 |
2 |
| Thermal Ceramics de France | 2 |
2 |
| Garibaldi S.A. | 7 |
2 |
| Engenex Pty Ltd | 2 |
2 |
| E. I. du Pont de Nemours and Company | 4082 |
1 |
| Nippon Telegraph and Telephone Corporation | 17341 |
1 |
| 1311854 Ontario Limited | 18 |
1 |
| Belgo Bekaert Arames Ltda | 4 |
1 |
| China University of Mining and Technology, Beijing | 93 |
1 |
| Contech Engineered Solutions LLC | 278 |
1 |
| Other owners | 43 |