- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 35/04 - Safety devices
Patent holdings for IPC class E21C 35/04
Total number of patents in this class: 41
10-year publication summary
|
1
|
3
|
0
|
5
|
2
|
5
|
5
|
2
|
1
|
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 |
6 |
| Joy Global Underground Mining LLC | 344 |
6 |
| Sandvik Mining and Construction Oy | 889 |
4 |
| Caterpillar Inc. | 10285 |
2 |
| China University of Mining and Technology | 1312 |
2 |
| Sandvik Intellectual Property AB | 1394 |
2 |
| Limited Liability Company "corum Group" | 16 |
2 |
| Caterpillar Global Mining Europe GmbH | 85 |
1 |
| Anhui University of Science and Technology | 199 |
1 |
| Caterpillar Global Mining Equipment LLC | 181 |
1 |
| J.H. Fletcher & Co. | 71 |
1 |
| Modular Mining Systems, Inc. | 92 |
1 |
| RAG Aktiengesellschaft | 29 |
1 |
| Shandong University of Science and Technology | 546 |
1 |
| Tensar Corporation | 8 |
1 |
| West Virginia University | 182 |
1 |
| Arvus Tecnologia Ltda. | 3 |
1 |
| Sany Heavy Equipment Co., Ltd. | 94 |
1 |
| Sandvik SRP AB | 107 |
1 |
| Kopex Machinery Spółka Akcyjna | 4 |
1 |
| Other owners | 4 |