- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge 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: 392
10-year publication summary
|
31
|
41
|
48
|
29
|
38
|
40
|
38
|
35
|
23
|
12
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Intellectual Property AB | 1484 |
36 |
| Joy Global Underground Mining LLC | 348 |
36 |
| Herrenknecht AG | 203 |
21 |
| Komatsu Ltd. | 4538 |
20 |
| China University of Mining and Technology | 1251 |
16 |
| Sany Heavy Equipment Co., Ltd. | 77 |
11 |
| Sandvik Mining and Construction G.m.b.H. | 91 |
9 |
| EarthGrid PBC | 26 |
9 |
| Bouygues Travaux Publics | 28 |
8 |
| Hypersciences, Inc. | 43 |
8 |
| Caterpillar Global Mining Europe GmbH | 85 |
7 |
| China Railway Engineering Equipment Group Co., Ltd. | 44 |
7 |
| US Synthetic Corporation | 624 |
6 |
| Epiroc Rock Drills Aktiebolag | 513 |
6 |
| The Robbins Company | 9 |
5 |
| China Railway Construction Heavy Industry Co., Ltd | 17 |
5 |
| Shanxi Tiandi Coal Mining Machinery Co., Ltd. | 20 |
5 |
| Global TBM Company | 5 |
5 |
| Caterpillar Inc. | 9539 |
4 |
| Northeastern University | 538 |
4 |
| Other owners | 164 |