- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 11/02 - Lining predominantly with wood
Patent holdings for IPC class E21D 11/02
Total number of patents in this class: 3
10-year publication summary
|
0
|
0
|
0
|
1
|
1
|
0
|
0
|
0
|
0
|
0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| CrossCut Enterprises LLC | 2 |
1 |
| Jamal Rostami Engineering Services LLC | 4 |
1 |
| TopEng Inc. | 5 |
1 |
| Other owners | 0 |