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F04D 19/022

With concentric rows of vanes

Official title: {with concentric rows of vanes;}

F04D19/022 (With concentric rows of vanes) appears on 60 US grants and 70 published applications in this corpus.

Search patents in F04D

Granted patents: 60
Published applications: 70
Assignees: 55
Inventors: 145
Latest grant: 16 Jun 2026

Filings by year

F04D 19/022: granted patents and published applications per publication year
Year	Granted patents	Published applications
1977	1	0
1978	0	0
1979	0	0
1980	0	0
1981	0	0
1982	0	0
1983	0	0
1984	0	0
1985	1	0
1986	0	0
1987	0	0
1988	1	0
1989	1	0
1990	0	0
1991	0	0
1992	0	0
1993	0	0
1994	0	0
1995	0	0
1996	0	0
1997	0	0
1998	1	0
1999	0	0
2000	0	0
2001	0	0
2002	0	0
2003	1	0
2004	0	0
2005	0	0
2006	1	5
2007	0	3
2008	6	4
2009	1	3
2010	0	1
2011	1	2
2012	3	2
2013	2	2
2014	2	3
2015	0	2
2016	2	4
2017	2	3
2018	3	2
2019	2	4
2020	4	4
2021	4	5
2022	2	7
2023	6	2
2024	5	3
2025	5	8
2026	3	1

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Recent patents

Combined fan blade structure and air outlet device16 Jun 2026US 12,655,853 B2Xuxin Technology (Shenzhen) Group Co., Ltd
Air moving devices, aerodynamic rotor, and methods14 Apr 2026US 12,601,357 B2Whisper Aero Inc.
Air moving devices, aerodynamic rotor, and methods3 Mar 2026US 12,565,896 B2Whisper Aero Inc.
Air-moving device with single-part rotor and methods30 Dec 2025US 12,510,089 B2Whisper Aero Inc.
Fan with multilayer fan blades14 Oct 2025US 12,442,388 B2Huizhou Xunshuo Technology Co., Ltd

Most cited

By later US patents