- 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: 121
10-year publication summary
|
8
|
9
|
6
|
7
|
9
|
6
|
3
|
8
|
6
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sandvik Mining and Construction Oy | 863 |
21 |
| Joy Global Underground Mining LLC | 349 |
15 |
| Sandvik Intellectual Property AB | 1430 |
12 |
| Komatsu Ltd. | 4658 |
11 |
| Underground Extraction Technologies Pty Ltd | 17 |
7 |
| The University of Tokyo | 4298 |
5 |
| Minrail Inc. | 5 |
3 |
| Russell Mineral Equipment Pty Ltd | 73 |
3 |
| Epiroc Rock Drills Aktiebolag | 601 |
3 |
| Caterpillar Inc. | 10027 |
2 |
| Prairie Machine & Parts Mfg. - Partnership | 40 |
2 |
| Sandvik Mining and Construction G.m.b.H. | 90 |
2 |
| Sandvik Mining and Construction Materials Handling GmbH & Co KG | 6 |
2 |
| Continental Global Material Handling Inc. | 23 |
2 |
| Continental Global Material Handling LLC | 25 |
2 |
| Pivot Electric Machine Corp. | 3 |
2 |
| Bouygues Travaux Publics | 27 |
1 |
| Caterpillar Global Mining Highwall Miners LLC | 4 |
1 |
| Dux Machinery Corporation | 6 |
1 |
| Joy Global Longview Operations LLC | 14 |
1 |
| Other owners | 23 |