- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 37/02 - Other methods or devices for dislodging with or without loading by wedges
Patent holdings for IPC class E21C 37/02
Total number of patents in this class: 6
10-year publication summary
|
0
|
3
|
1
|
2
|
0
|
1
|
2
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Ishimoto Kensetsu Co., Ltd. | 2 |
2 |
| Hirado Kinzoku Kogyo Co., Ltd. | 2 |
1 |
| Kirnuvuori Oy | 1 |
1 |
| DARDA GmbH | 1 |
1 |
| Yamamoto Rock Machine Ltd | 1 |
1 |
| Other owners | 0 |