- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 15/06 - Filling-up mechanically
Patent holdings for IPC class E21F 15/06
Total number of patents in this class: 34
10-year publication summary
6
|
3
|
2
|
2
|
2
|
6
|
3
|
1
|
6
|
4
|
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 |
17 |
Strata Products Worldwide, LLC | 61 |
5 |
Xuzhou Zhongkuang Backfilling&mining Technology Co., Ltd | 8 |
2 |
Western Digital Technologies, Inc. | 1043 |
1 |
Anhui University of Science and Technology | 156 |
1 |
Jiangsu New Century Jiangnan Environmental Protection Co., Ltd. | 3 |
1 |
Jri Ingenieria S.A. | 2 |
1 |
Shandong University | 886 |
1 |
Technische Universitat Bergakademie Freiberg | 111 |
1 |
Noaq Flood Protection AB | 9 |
1 |
Shandong Xinmei Machinery Equipment Co., Ltd | 1 |
1 |
Wanbao Mining Ltd. | 6 |
1 |
Drill Tech Drilling & Shoring, Inc. | 1 |
1 |
Other owners | 0 |