- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 25/10 - RodsDrums
Patent holdings for IPC class E21C 25/10
Total number of patents in this class: 123
10-year publication summary
|
28
|
20
|
18
|
9
|
13
|
7
|
11
|
4
|
7
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Wirtgen GmbH | 501 |
29 |
| Joy Global Underground Mining LLC | 347 |
14 |
| Kennametal Inc. | 1387 |
6 |
| Caterpillar Paving Products Inc. | 668 |
6 |
| China University of Mining and Technology | 1245 |
5 |
| Joy MM Delaware, Inc. | 56 |
5 |
| Keystone Engineering & Mfg. LLC | 12 |
5 |
| Vermeer Manufacturing Company | 634 |
4 |
| BOMAG GmbH | 401 |
3 |
| Novatek IP, LLC | 55 |
3 |
| Shandong University of Science and Technology | 506 |
3 |
| HeNan Polytechnic University | 97 |
3 |
| Jiangsu Zhongji Mine Equipment Company Ltd. | 4 |
3 |
| Shanxi Tiandi Coal Mining Machinery Co., Ltd. | 20 |
3 |
| Caterpillar Inc. | 9509 |
2 |
| Caterpillar Global Mining Europe GmbH | 85 |
2 |
| Commonwealth Scientific and Industrial Research Organisation | 1647 |
2 |
| Meccanica Breganzese S.p.A. in Breve MB S.p.A. | 36 |
2 |
| Sandvik Intellectual Property AB | 1492 |
2 |
| The Sollami Company | 52 |
2 |
| Other owners | 19 |