- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large 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: 119
10-year publication summary
7
|
6
|
14
|
11
|
14
|
20
|
12
|
4
|
6
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Herrenknecht AG | 186 |
18 |
Bochumer Eisenhütte Heintzmann GmbH & Co. KG | 12 |
3 |
Sika Technology AG | 2650 |
3 |
Jamal Rostami Engineering Services LLC | 4 |
3 |
TopEng Inc. | 5 |
3 |
Agence Nationale pour La Gestion des Dechets Radioactifs | 46 |
2 |
"agru" Kunststofftechnik Gesellschaft m.b.H. | 62 |
2 |
Datwyler Sealing Technologies Deutschland GmbH | 15 |
2 |
FCI Holdings Delaware, Inc. | 158 |
2 |
Hyperloop Technologies, Inc. | 207 |
2 |
Lock-Block Ltd. | 33 |
2 |
Technical Tunnelling Components Ltd | 2 |
2 |
Technische Universitat Wien | 376 |
2 |
Constructions Mecaniques Consultants | 6 |
2 |
Trelleborg Ridderkerk B.V. | 10 |
2 |
Ghella S.p.A. | 7 |
2 |
Acciona Constucción, S.A. | 2 |
2 |
China Railway 14th Bureau Group Co., Ltd. | 14 |
2 |
China State Construction Engineering (Hong Kong) Limited | 11 |
2 |
Jinan Rail Transit Group Co., Ltd | 9 |
2 |
Other owners | 59 |