- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 25/22 - Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
Patent holdings for IPC class E21C 25/22
Total number of patents in this class: 5
10-year publication summary
|
0
|
1
|
1
|
2
|
0
|
0
|
0
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alliance Coal, LLC | 7 |
1 |
| Saipem S.p.A. | 515 |
1 |
| Vermeer Manufacturing Company | 660 |
1 |
| Diamond Stone Technologies Inc. | 2 |
1 |
| SFERA S.r.l. | 10 |
1 |
| Other owners | 0 |