- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 13/02 - Methods
Patent holdings for IPC class E21D 13/02
Total number of patents in this class: 7
10-year publication summary
|
1
|
0
|
0
|
1
|
0
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0
|
1
|
0
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Orica Explosives Technology Pty Ltd. | 191 |
2 |
| National University Corporation Nagoya University | 812 |
1 |
| Shimizu Corporation | 99 |
1 |
| Universidad de Alicante | 230 |
1 |
| China Construction Third Bureau First Engineering Co., Ltd. | 14 |
1 |
| Beijing Urban Construction Design and Development Group Co., Ltd | 11 |
1 |
| Other owners | 0 |