- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 15/502 - Prop bodies characterised by their shape, e.g. of specified cross-section
Patent holdings for IPC class E21D 15/502
Total number of patents in this class: 13
10-year publication summary
|
1
|
1
|
1
|
4
|
1
|
1
|
2
|
0
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| FCI Holdings Delaware, LLC | 98 |
3 |
| Micon | 12 |
2 |
| Zieta Prozessdesign Sp. z o.o. | 31 |
2 |
| Burrell Mining Products, Inc. | 5 |
1 |
| China University of Mining and Technology | 1292 |
1 |
| FCI Holdings Delaware, Inc. | 44 |
1 |
| Setevox (Pty) Ltd | 3 |
1 |
| Jenner Innovation Pty Ltd | 6 |
1 |
| Acrow Formwork & Scaffolding Pty Ltd | 1 |
1 |
| Other owners | 0 |