- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large underground chambers
- E21D 9/10 - Making by using boring or cutting machines
Patent holdings for IPC class E21D 9/10
Total number of patents in this class: 368
10-year publication summary
|
22
|
31
|
41
|
48
|
29
|
38
|
40
|
36
|
34
|
6
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Joy Global Underground Mining LLC | 331 |
37 |
| Sandvik Intellectual Property AB | 1634 |
36 |
| Herrenknecht AG | 186 |
19 |
| Komatsu Ltd. | 4265 |
16 |
| China University of Mining and Technology | 1189 |
15 |
| Sandvik Mining and Construction G.m.b.H. | 85 |
9 |
| Bouygues Travaux Publics | 30 |
8 |
| Sany Heavy Equipment Co., Ltd. | 58 |
8 |
| EarthGrid PBC | 21 |
8 |
| Caterpillar Global Mining Europe GmbH | 86 |
7 |
| China Railway Engineering Equipment Group Co., Ltd. | 40 |
7 |
| Hypersciences, Inc. | 43 |
7 |
| US Synthetic Corporation | 601 |
6 |
| Epiroc Rock Drills Aktiebolag | 405 |
6 |
| The Robbins Company | 9 |
5 |
| Arcbyt, Inc. | 25 |
5 |
| Global TBM Company | 6 |
5 |
| Caterpillar Inc. | 8877 |
4 |
| Northeastern University | 493 |
4 |
| Underground Infrastructure Technologies Corporation | 11 |
4 |
| Other owners | 152 |