- All sections
- E - Fixed constructions
- E21F - Safety devices, transport, filling-up, rescue, ventilation, or drainage in or of mines or tunnels
- E21F 1/06 - Duct connections
Patent holdings for IPC class E21F 1/06
Total number of patents in this class: 13
10-year publication summary
|
4
|
2
|
1
|
1
|
0
|
1
|
1
|
1
|
1
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Polyvent Pty Ltd | 3 |
3 |
| ABC Canada Technology Group Ltd. | 20 |
1 |
| AC Industries Pty Ltd | 2 |
1 |
| Chembio Shelter, Inc. | 4 |
1 |
| Clipsal Australia Pty Ltd | 31 |
1 |
| Floodbreak, L.L.C. | 33 |
1 |
| GREE Electric Appliances, Inc. of Zhuhai | 3241 |
1 |
| Mecanicad Inc. | 5 |
1 |
| Minetek Investments Pty Ltd | 21 |
1 |
| Guizhou Transportation Planning Survey and Design Institute Co. Ltd | 3 |
1 |
| MISHAYEV, Victor | 1 |
1 |
| Other owners | 0 |