- All sections
- E - Fixed constructions
- E21D - Shafts; tunnels; galleries; large 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: 635
10-year publication summary
72
|
47
|
52
|
80
|
61
|
55
|
52
|
33
|
44
|
12
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
FCI Holdings Delaware, Inc. | 158 |
48 |
Sandvik Intellectual Property AB | 1634 |
36 |
China University of Mining and Technology | 1189 |
30 |
Epiroc Drilling Tools Aktiebolag | 89 |
24 |
NCM Innovations (Pty) Ltd | 35 |
22 |
Hilti Aktiengesellschaft | 3227 |
21 |
Minova International Limited | 104 |
19 |
Innovative Mining Products (Pty) Ltd, TA New Concept Mining | 28 |
13 |
DYWIDAG-Systems International Pty Limited | 14 |
10 |
Shandong University of Science and Technology | 459 |
9 |
Garock Pty Ltd | 9 |
8 |
Atlas Copco MAI GmbH | 13 |
7 |
Sandvik Mining and Construction Tools AB | 147 |
7 |
Sandvik Mining and Construction Australia (production/supply) Pty Ltd. | 37 |
7 |
DSI Underground Australia Pty Limited | 11 |
7 |
1311854 Ontario Limited | 19 |
6 |
Gazmick Pty Ltd | 7 |
6 |
Sandvik Mining and Construction G.m.b.H. | 85 |
6 |
Sandvik Mining and Construction Australia (Production Supply) Pty Ltd | 13 |
6 |
Rocbolt Technologies (Pty) Ltd. | 6 |
6 |
Other owners | 337 |