- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 11/38 - WaterproofingHeat insulatingSoundproofingElectric insulating
Patent holdings for IPC class E21D 11/38
Total number of patents in this class: 224
10-year publication summary
|
19
|
12
|
26
|
18
|
22
|
15
|
11
|
14
|
12
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Herrenknecht AG | 215 |
11 |
| Sika Technology AG | 3019 |
9 |
| GCP Applied Technologies Inc. | 472 |
6 |
| Foamrox AS | 8 |
6 |
| AMCOL International Corporation | 249 |
5 |
| Jiangsu Canlon Building Materials Co., Ltd. | 92 |
4 |
| Maccaferri TUNNELING S.r.l. | 9 |
4 |
| China University of Mining and Technology | 1316 |
3 |
| Datwyler Sealing Technologies Deutschland GmbH | 14 |
3 |
| Keiwa Inc. | 206 |
3 |
| Shandong University | 1160 |
3 |
| SEALABLE Solutions GmbH | 11 |
3 |
| "agru" Kunststofftechnik Gesellschaft m.b.H. | 12 |
2 |
| Beijing Oriental Yuhong Waterproof Technology Co. Ltd. | 54 |
2 |
| China University of Mining and Technology, Beijing | 105 |
2 |
| CSI Tunnel Systems | 2 |
2 |
| Daetwyler Sealing Technologies Deutschland GmbH | 6 |
2 |
| Geobrugg AG | 106 |
2 |
| Köster Bauchemie AG | 13 |
2 |
| NV Bekaert SA | 725 |
2 |
| Other owners | 148 |