- All sections
- E - Fixed constructions
- E21C - Mining or quarrying
- E21C 25/18 - SawsDiscsWheels
Patent holdings for IPC class E21C 25/18
Total number of patents in this class: 86
10-year publication summary
|
4
|
10
|
15
|
4
|
12
|
9
|
7
|
3
|
6
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Underground Mining LLC | 348 |
33 |
| Element Six (UK) Limited | 218 |
17 |
| Sandvik Intellectual Property AB | 1475 |
14 |
| US Synthetic Corporation | 617 |
4 |
| Joy Global Underground Mining LLC | 3 |
3 |
| Bucyrus Europe GmbH | 32 |
1 |
| Herrenknecht AG | 203 |
1 |
| HYDAC Technology GmbH | 237 |
1 |
| Joy MM Delaware, Inc. | 56 |
1 |
| Northeastern University | 542 |
1 |
| The Robbins Company | 9 |
1 |
| Sandvik Mining and Construction G.m.b.H. | 88 |
1 |
| Simex Engineering S.r.l. | 21 |
1 |
| ESCO Group LLC | 316 |
1 |
| de Beers Group Services Proprietary Limited | 1 |
1 |
| Jiangsu Zhongji Mine Equipment Company Ltd. | 5 |
1 |
| SynTec Diamond Tools, Inc. | 4 |
1 |
| Xi'an J.W Drilling Machines & Toolsproduction Co., Ltd | 1 |
1 |
| Evolution Drilling Tools, Inc. | 6 |
1 |
| Zhalainuoer Coal Industry Co., Ltd | 9 |
1 |
| Other owners | 0 |