- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 17/00 - Caps for supporting mine roofs
Patent holdings for IPC class E21D 17/00
Total number of patents in this class: 8
10-year publication summary
|
1
|
0
|
1
|
2
|
1
|
1
|
1
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Komatsu America Corp. | 69 |
1 |
| American Consulting Technology & Research, Inc. | 8 |
1 |
| Commonwealth Scientific and Industrial Research Organisation | 1659 |
1 |
| Council of Scientific & Industrial Research | 1431 |
1 |
| Shandong University of Science and Technology | 538 |
1 |
| CrossCut Enterprises LLC | 2 |
1 |
| Ccteg Chinese Institute of Coal Science | 6 |
1 |
| Gainwell Engineering Global Pte. Ltd. | 11 |
1 |
| Other owners | 0 |