- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F03D - Wind motors
- F03D 9/46 - Tunnels or streets
Patent holdings for IPC class F03D 9/46
Total number of patents in this class: 17
10-year publication summary
|
1
|
1
|
3
|
3
|
4
|
3
|
5
|
5
|
2
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alpha 311 Limited | 5 |
4 |
| NTN Corporation | 4975 |
2 |
| Walter Corporation LLC | 5 |
2 |
| Initech Co., Ltd. | 2 |
1 |
| Korea Institute of Ceramic Engineering and Technology | 137 |
1 |
| Teral Inc. | 14 |
1 |
| Wenzhou University | 96 |
1 |
| Undula Tech LLC | 1 |
1 |
| Alternative Energy Innovations, S.L. | 7 |
1 |
| MORINA, Shpetim | 1 |
1 |
| Mario Immig | 3 |
1 |
| Energypier AG | 2 |
1 |
| Other owners | 0 |