- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 47/00 - Machines for obtaining, or the removal of, materials in open-pit mines
Patent holdings for IPC class E21C 47/00
Total number of patents in this class: 122
10-year publication summary
|
7
|
9
|
7
|
8
|
2
|
8
|
7
|
6
|
4
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Surface Mining Inc | 371 |
19 |
| Komatsu Ltd. | 4668 |
17 |
| Wirtgen GmbH | 518 |
14 |
| Hitachi Construction Machinery Co., Ltd. | 2725 |
6 |
| Weatherford Technology Holdings, LLC | 2072 |
4 |
| Technological Resources Pty. Limited | 441 |
4 |
| ThyssenKrupp AG | 3475 |
4 |
| ThyssenKrupp Industrial Solutions AG | 630 |
4 |
| Sandvik Mining and Construction Oy | 875 |
3 |
| hummingbird solutions inc | 7 |
3 |
| Caterpillar Inc. | 10191 |
2 |
| BOMAG GmbH | 396 |
2 |
| Emergent Mining Technologies Pty Ltd | 3 |
2 |
| Mindspark Technologies Pty Ltd | 12 |
2 |
| SunCor Energy Inc. | 739 |
2 |
| FLSmidth A/S | 785 |
2 |
| Hitachi, Ltd. | 15944 |
1 |
| Bridgestone Corporation | 7238 |
1 |
| American Equipment & Machine, Inc. | 1 |
1 |
| Bauer Maschinen GmbH | 241 |
1 |
| Other owners | 28 |