- 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: 222
10-year publication summary
|
14
|
15
|
10
|
24
|
17
|
21
|
14
|
11
|
13
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Herrenknecht AG | 204 |
11 |
| Sika Technology AG | 2875 |
11 |
| GCP Applied Technologies Inc. | 469 |
6 |
| Foamrox AS | 9 |
6 |
| AMCOL International Corporation | 265 |
5 |
| Datwyler Sealing Technologies Deutschland GmbH | 15 |
3 |
| Keiwa Inc. | 188 |
3 |
| Shandong University | 1053 |
3 |
| Skumtech AS | 4 |
3 |
| Jiangsu Canlon Building Materials Co., Ltd. | 83 |
3 |
| SEALABLE Solutions GmbH | 11 |
3 |
| "agru" Kunststofftechnik Gesellschaft m.b.H. | 61 |
2 |
| Beijing Oriental Yuhong Waterproof Technology Co. Ltd. | 53 |
2 |
| China University of Mining and Technology | 1265 |
2 |
| CSI Tunnel Systems | 2 |
2 |
| Daetwyler Sealing Technologies Deutschland GmbH | 5 |
2 |
| Geobrugg AG | 104 |
2 |
| Köster Bauchemie AG | 14 |
2 |
| Kuraray Co., Ltd. | 3514 |
2 |
| NV Bekaert SA | 744 |
2 |
| Other owners | 147 |