- 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: 228
10-year publication summary
|
15
|
10
|
24
|
17
|
21
|
14
|
11
|
13
|
12
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Herrenknecht AG | 209 |
11 |
| Sika Technology AG | 2931 |
10 |
| GCP Applied Technologies Inc. | 470 |
6 |
| Foamrox AS | 8 |
6 |
| AMCOL International Corporation | 260 |
5 |
| Jiangsu Canlon Building Materials Co., Ltd. | 91 |
4 |
| Maccaferri TUNNELING S.r.l. | 8 |
4 |
| China University of Mining and Technology | 1286 |
3 |
| Datwyler Sealing Technologies Deutschland GmbH | 15 |
3 |
| Keiwa Inc. | 190 |
3 |
| Shandong University | 1100 |
3 |
| SEALABLE Solutions GmbH | 11 |
3 |
| "agru" Kunststofftechnik Gesellschaft m.b.H. | 62 |
2 |
| Beijing Oriental Yuhong Waterproof Technology Co. Ltd. | 51 |
2 |
| CSI Tunnel Systems | 2 |
2 |
| Daetwyler Sealing Technologies Deutschland GmbH | 5 |
2 |
| Geobrugg AG | 108 |
2 |
| Köster Bauchemie AG | 14 |
2 |
| Kuraray Co., Ltd. | 3559 |
2 |
| NV Bekaert SA | 733 |
2 |
| Other owners | 151 |