- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 9/06 - Making by using a driving shield
Patent holdings for IPC class E21D 9/06
Total number of patents in this class: 198
10-year publication summary
|
7
|
12
|
14
|
5
|
15
|
16
|
17
|
17
|
20
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Herrenknecht AG | 197 |
17 |
| China Railway Engineering Equipment Group Co., Ltd. | 42 |
10 |
| China Railway 14th Bureau Group Co., Ltd. | 14 |
9 |
| Komatsu Ltd. | 4493 |
6 |
| MAPEI S.p.A. | 579 |
5 |
| China Railway Tunnel Group Co., Ltd | 24 |
5 |
| hyperTunnel IP Limited | 24 |
5 |
| China Railway Siyuan Survey and Design Group Co., Ltd. | 69 |
4 |
| State Key Laboratory of Shield Machine and Boring Technology | 16 |
4 |
| CCCC National Engineering Research Center of Dredging Technology and Equipment Co., Ltd. | 19 |
4 |
| China Railway Sunward Engineering Equipment Co., Ltd | 8 |
4 |
| Bouygues Travaux Publics | 28 |
3 |
| The Robbins Company | 9 |
3 |
| Shandong University | 1007 |
3 |
| Zhejiang University | 3060 |
3 |
| China University of Mining and Technology | 1232 |
2 |
| Geopier Foundation Company, Inc. | 146 |
2 |
| Kabuki Construction Co., Ltd. | 3 |
2 |
| Korea Institute of Construction Technology | 77 |
2 |
| Lamberti SpA | 256 |
2 |
| Other owners | 103 |