- All sections
- F - Mechanical engineeringlightingheatingweaponsblasting
- F03D - Wind motors
- F03D 9/18 - Combinations of wind motors with apparatus storing energy storing heat
Patent holdings for IPC class F03D 9/18
Total number of patents in this class: 97
10-year publication summary
|
3
|
6
|
3
|
5
|
7
|
7
|
19
|
21
|
17
|
15
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rondo Energy, Inc. | 72 |
55 |
| Hydrostor Inc. | 58 |
6 |
| Sumitomo Electric Industries, Ltd. | 15414 |
4 |
| Eavor Technologies Inc. | 90 |
3 |
| Nippon Steel Corporation | 6203 |
2 |
| Sunlight Power, Inc. | 6 |
2 |
| Siemens Gamesa Renewable Energy A/S | 1862 |
2 |
| Siemens Energy Global GmbH & Co. KG | 2937 |
2 |
| Toshiba Corporation | 12317 |
1 |
| Kobe Steel, Ltd. | 870 |
1 |
| Kyoto University | 2798 |
1 |
| Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd. | 196 |
1 |
| Shenzhen Enesoon Science & Technology Co., Ltd. | 48 |
1 |
| The University of Nottingham | 327 |
1 |
| University of Virginia Patent Foundation | 1564 |
1 |
| Xinjiang GoldWind Science & Technology Co., Ltd. | 118 |
1 |
| Vestas Wind Systems A/S | 3672 |
1 |
| H2O Turbines Ltd. | 3 |
1 |
| China Three Gorges Corporation | 178 |
1 |
| Energy Dome S.r.l. | 1 |
1 |
| Other owners | 9 |