- 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: 174
10-year publication summary
12
|
6
|
14
|
14
|
12
|
10
|
22
|
19
|
18
|
6
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
China University of Mining and Technology | 1189 |
13 |
Komatsu Ltd. | 4265 |
9 |
Technological Resources Pty. Limited | 444 |
9 |
Shandong University of Science and Technology | 459 |
5 |
Sandvik Mining and Construction Oy | 703 |
4 |
Jack Kennedy Metal Products & Buildings, Inc. | 37 |
3 |
Peck Tech Consulting Ltd. | 20 |
3 |
Penguin Automated Systems Inc. | 19 |
3 |
The University of Sydney | 562 |
3 |
Conveyor Manufacturers Australia Pty Ltd | 7 |
3 |
Ccteg Coal Mining Research Institute | 17 |
3 |
Caterpillar Inc. | 8877 |
2 |
Anhui University of Science and Technology | 156 |
2 |
Atlas Copco Rock Drills AB | 177 |
2 |
China Shenhua Energy Company Limited | 24 |
2 |
Commonwealth Scientific and Industrial Research Organisation | 1652 |
2 |
MacLean Engineering & Marketing | 2 |
2 |
Queen's University at Kingston | 517 |
2 |
Shandong University | 886 |
2 |
Vale S.A. | 262 |
2 |
Other owners | 98 |