- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 11/08 - Lining with building materials with preformed concrete slabs
Patent holdings for IPC class E21D 11/08
Total number of patents in this class: 140
10-year publication summary
|
6
|
12
|
10
|
13
|
16
|
12
|
4
|
7
|
10
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Herrenknecht AG | 203 |
20 |
| Jamal Rostami Engineering Services LLC | 4 |
4 |
| Bochumer Eisenhütte Heintzmann GmbH & Co. KG | 12 |
3 |
| Sika Technology AG | 2871 |
3 |
| TopEng Inc. | 5 |
3 |
| Maccaferri TUNNELING S.r.l. | 3 |
3 |
| Agence Nationale pour La Gestion des Dechets Radioactifs | 51 |
2 |
| "agru" Kunststofftechnik Gesellschaft m.b.H. | 61 |
2 |
| China Railway Engineering Equipment Group Co., Ltd. | 46 |
2 |
| Datwyler Sealing Technologies Deutschland GmbH | 15 |
2 |
| Hyperloop Technologies, Inc. | 181 |
2 |
| Lock-Block Ltd. | 31 |
2 |
| Sun Yat-sen University | 680 |
2 |
| Technical Tunnelling Components Ltd | 2 |
2 |
| Technische Universitat Wien | 385 |
2 |
| Constructions Mecaniques Consultants | 6 |
2 |
| Trelleborg Ridderkerk B.V. | 10 |
2 |
| Jackcontrol AG | 7 |
2 |
| China Railway 14th Bureau Group Co., Ltd. | 14 |
2 |
| China State Construction Engineering (Hong Kong) Limited | 11 |
2 |
| Other owners | 76 |