- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 11/14 - Lining predominantly with metal
Patent holdings for IPC class E21D 11/14
Total number of patents in this class: 38
10-year publication summary
|
3
|
1
|
4
|
7
|
3
|
0
|
2
|
2
|
3
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| China University of Mining and Technology | 1294 |
2 |
| S & P Clever Reinforcement Company AG | 24 |
2 |
| CRRC Construction Engrg. Co., Ltd. | 2 |
2 |
| Garibaldi S.A. | 7 |
2 |
| Industrias Chilenas de Alambre Inchalam S.A. | 10 |
2 |
| FCI Holdings Delaware, LLC | 100 |
2 |
| 1311854 Ontario Limited | 18 |
1 |
| China University of Mining and Technology, Beijing | 103 |
1 |
| FCI Holdings Delaware, Inc. | 44 |
1 |
| Jack Kennedy Metal Products & Buildings, Inc. | 32 |
1 |
| Korea Institute of Civil Engineering and Building Technology | 139 |
1 |
| Nanjing Lianzhong Construction Engineering Technology Co., Ltd. | 18 |
1 |
| Satinwood Inc. | 1 |
1 |
| Tectona Ltd. | 1 |
1 |
| Tianjin University | 884 |
1 |
| GE Infrastructure Technology, LLC | 6188 |
1 |
| Hyun Engineering and Construction Co., Ltd | 4 |
1 |
| Jamal Rostami Engineering Services LLC | 4 |
1 |
| TopEng Inc. | 5 |
1 |
| Cheong AM | 2 |
1 |
| Other owners | 12 |