- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 23/14 - Effecting automatic sequential movement of supports, e.g. one behind the other
Patent holdings for IPC class E21D 23/14
Total number of patents in this class: 19
10-year publication summary
|
2
|
1
|
1
|
2
|
1
|
3
|
0
|
4
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Taiyuan University of Technology | 307 |
3 |
| Tiefenbach Control Systems GmbH | 18 |
3 |
| China University of Mining and Technology | 1297 |
2 |
| Joy Global Underground Mining LLC | 345 |
2 |
| Xuzhou Goldfluid Hydraulic Technology Development Co., Ltd. | 18 |
2 |
| Huawei Technologies Co., Ltd. | 121322 |
1 |
| Caterpillar Inc. | 10219 |
1 |
| Beijing Ccri-tianma Automation Technology Co., Ltd. | 75 |
1 |
| Off-World, Inc. | 18 |
1 |
| Tiandi Science & Technology Co., Ltd. | 20 |
1 |
| Beijing Tianma Intelligent Control Technology Co., Ltd. | 25 |
1 |
| Ccteg Coal Mining Research Institute | 42 |
1 |
| Other owners | 0 |