- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 13/02 - Transport specially adapted to underground conditions in galleries
Patent holdings for IPC class E21F 13/02
Total number of patents in this class: 117
10-year publication summary
|
18
|
8
|
10
|
7
|
9
|
10
|
6
|
4
|
8
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Mining and Construction Oy | 823 |
20 |
| Joy Global Underground Mining LLC | 348 |
14 |
| Sandvik Intellectual Property AB | 1484 |
12 |
| Komatsu Ltd. | 4538 |
10 |
| Underground Extraction Technologies Pty Ltd | 17 |
7 |
| The University of Tokyo | 4170 |
5 |
| Minrail Inc. | 5 |
3 |
| Russell Mineral Equipment Pty Ltd | 71 |
3 |
| Caterpillar Inc. | 9539 |
2 |
| Sandvik Mining and Construction G.m.b.H. | 91 |
2 |
| Sandvik Mining and Construction Materials Handling GmbH & Co KG | 6 |
2 |
| Torex Gold Resources Inc. | 6 |
2 |
| Epiroc Rock Drills Aktiebolag | 513 |
2 |
| Continental Global Material Handling Inc. | 23 |
2 |
| Continental Global Material Handling LLC | 25 |
2 |
| Bouygues Travaux Publics | 28 |
1 |
| Caterpillar Global Mining Highwall Miners LLC | 4 |
1 |
| Dux Machinery Corporation | 6 |
1 |
| Joy Global Longview Operations LLC | 13 |
1 |
| MacDonald Dettwiler & Associates Inc. | 13 |
1 |
| Other owners | 24 |