F03D 3/0409
Surrounding the rotor
Official title: {surrounding the rotor (F03D3/0427 takes precedence)}
F03D3/0409 (Surrounding the rotor) appears on 162 US grants and 210 published applications in this corpus.
Search patents in F03D- Granted patents
- 162
- Published applications
- 210
- Assignees
- 69
- Inventors
- 296
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 3 |
| 2003 | 1 | 2 |
| 2004 | 2 | 4 |
| 2005 | 4 | 1 |
| 2006 | 3 | 6 |
| 2007 | 2 | 6 |
| 2008 | 2 | 5 |
| 2009 | 1 | 6 |
| 2010 | 7 | 9 |
| 2011 | 1 | 10 |
| 2012 | 4 | 13 |
| 2013 | 10 | 17 |
| 2014 | 5 | 12 |
| 2015 | 12 | 15 |
| 2016 | 11 | 12 |
| 2017 | 10 | 3 |
| 2018 | 7 | 13 |
| 2019 | 6 | 7 |
| 2020 | 10 | 6 |
| 2021 | 5 | 9 |
| 2022 | 6 | 13 |
| 2023 | 6 | 11 |
| 2024 | 8 | 12 |
| 2025 | 11 | 7 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vertical wind turbine with external shroud comprising first and second shroud wings26 May 2026US 12,638,003 B2
- Vertical-axis wind turbine systems and devices10 Mar 2026US 12,571,368 B2
- No funnel housing wind turbine6 Jan 2026US 12,516,659 B2
- Wind turbine with rotational axis perpendicular to the wind flow25 Nov 2025US 12,480,468 B2
- Energy storage system14 Oct 2025US 12,442,358 B1Star Sailor Energy, Inc.
- Vertical axis wind turbine10 Sep 2026US 2026/0266259 A1Panemondial Ltd
- Trying to generate more energy from transportation vehicle's movements than it uses16 Jul 2026US 2026/0200332 A1
- Circular closed-loop turbine tunnel mechanism11 Jun 2026US 2026/0160227 A1
- An apparatus for controlling fluid flow to turbines4 Jun 2026US 2026/0153074 A1Newco142 Limited
- Systems and methods for harvesting aerodynamic energy16 Apr 2026US 2026/0103084 A1
Most cited
By later US patents
- Wind and solar electric generating plant109US 4,551,631 A1985
- Wind power machine68US 5,463,257 A1995
- System for the obtainment and the regulation of energy starting from air, sea and river currents67US 4,236,866 A1980
- Aerodynamic-hybrid vertical-axis wind turbine65US 7,329,965 B2Novastron Corporation · 2008
- Omni-directional vertical-axis wind turbine59US 6,465,899 B22002