- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 1/00 - Sinking shafts
Patent holdings for IPC class E21D 1/00
Total number of patents in this class: 24
10-year publication summary
|
3
|
0
|
1
|
2
|
2
|
0
|
1
|
2
|
0
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bergteamet AB | 10 |
2 |
| GE-Hitachi Nuclear Energy Americas LLC | 430 |
2 |
| Redpath Canada Limited | 14 |
2 |
| Avner and Yossi Civil Engineering and Projects Ltd | 1 |
1 |
| BRP-Rotax GmbH & Co. KG | 180 |
1 |
| China Railway Engineering Equipment Group Co., Ltd. | 46 |
1 |
| China University of Mining and Technology | 1256 |
1 |
| Futaba Corporation | 143 |
1 |
| Heindl Energy GmbH | 9 |
1 |
| NOK Corporation | 2222 |
1 |
| Poclain Hydraulics Industrie | 243 |
1 |
| Ric-Man Construction, Inc. | 4 |
1 |
| Shandong University | 1048 |
1 |
| Technological Resources Pty. Limited | 455 |
1 |
| Orica International Pte Ltd | 183 |
1 |
| Ars Electronica Linz GmbH & Co KG | 23 |
1 |
| Bceg Environmental Remediation Co., Ltd. | 13 |
1 |
| Sambo E&C Co., Ltd. | 2 |
1 |
| Shenzhen Highfeng Technology Co., Ltd | 52 |
1 |
| China Railway 18 Bureau Group Co., Ltd. | 9 |
1 |
| Other owners | 1 |