- All sections
- E - Fixed constructions
- E21D - Shaftstunnelsgallerieslarge underground chambers
- E21D 21/00 - Anchoring-bolts for roof, floor, or shaft-lining protection
Patent holdings for IPC class E21D 21/00
Total number of patents in this class: 665
10-year publication summary
|
47
|
52
|
80
|
61
|
55
|
52
|
33
|
50
|
42
|
21
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Intellectual Property AB | 1490 |
36 |
| China University of Mining and Technology | 1245 |
29 |
| FCI Holdings Delaware, Inc. | 61 |
26 |
| NCM Innovations (Pty) Ltd | 35 |
22 |
| Hilti Aktiengesellschaft | 3483 |
20 |
| FCI Holdings Delaware, LLC | 84 |
20 |
| Minova International Limited | 100 |
19 |
| Innovative Mining Products (Pty) Ltd, TA New Concept Mining | 30 |
15 |
| Epiroc Drilling Tools Aktiebolag | 82 |
14 |
| Sandvik Mining and Construction Australia (production/supply) Pty Ltd. | 49 |
12 |
| Shandong University of Science and Technology | 507 |
11 |
| Sandvik Mining and Construction Australia (Production Supply) Pty Ltd | 19 |
11 |
| DYWIDAG-Systems International Pty Limited | 14 |
10 |
| Garock Pty Ltd | 9 |
8 |
| Rocbolt Technologies (Pty) Ltd. | 8 |
8 |
| Epiroc Drilling Tools AB | 8 |
8 |
| Atlas Copco MAI GmbH | 10 |
7 |
| Gazmick Pty Ltd | 8 |
7 |
| Sandvik Mining and Construction Tools AB | 173 |
7 |
| DSI Underground Australia Pty Limited | 12 |
7 |
| Other owners | 368 |