- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 17/00 - Methods or devices for use in mines or tunnels, not covered elsewhere
Patent holdings for IPC class E21F 17/00
Total number of patents in this class: 205
10-year publication summary
|
4
|
8
|
12
|
6
|
9
|
21
|
20
|
14
|
16
|
18
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| China University of Mining and Technology | 1268 |
15 |
| Technological Resources Pty. Limited | 448 |
11 |
| Komatsu Ltd. | 4612 |
9 |
| Shandong University of Science and Technology | 532 |
6 |
| Epiroc Rock Drills Aktiebolag | 545 |
5 |
| Ccteg Coal Mining Research Institute | 41 |
4 |
| Jack Kennedy Metal Products & Buildings, Inc. | 33 |
3 |
| Northeastern University | 546 |
3 |
| Peck Tech Consulting Ltd. | 19 |
3 |
| Penguin Automated Systems Inc. | 14 |
3 |
| Sandvik Mining and Construction Oy | 838 |
3 |
| The University of Sydney | 609 |
3 |
| Conveyor Manufacturers Australia Pty Ltd | 7 |
3 |
| Caterpillar Inc. | 9686 |
2 |
| Anhui University of Science and Technology | 188 |
2 |
| China Shenhua Energy Company Limited | 24 |
2 |
| MacLean Engineering & Marketing | 2 |
2 |
| Queen's University at Kingston | 536 |
2 |
| Shandong University | 1063 |
2 |
| Vale S.A. | 273 |
2 |
| Other owners | 120 |