- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 37/10 - Devices with expanding elastic casings
Patent holdings for IPC class E21C 37/10
Total number of patents in this class: 8
10-year publication summary
|
4
|
2
|
0
|
1
|
0
|
0
|
2
|
2
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Emstone AB | 3 |
3 |
| Youngin Industrial Company Limited | 4 |
2 |
| Songam Co., Ltd. | 3 |
2 |
| Hunan Lieyan Technology Co., Ltd. | 1 |
1 |
| Other owners | 0 |