F04D 19/005
Reversible fans
Official title: {reversible fans}
F04D19/005 (Reversible fans) appears on 77 US grants and 92 published applications in this corpus.
Search patents in F04D- Granted patents
- 77
- Published applications
- 92
- Assignees
- 73
- Inventors
- 218
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 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 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 5 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 2 | 2 |
| 2016 | 2 | 10 |
| 2017 | 0 | 9 |
| 2018 | 6 | 7 |
| 2019 | 8 | 7 |
| 2020 | 9 | 7 |
| 2021 | 4 | 9 |
| 2022 | 8 | 10 |
| 2023 | 7 | 8 |
| 2024 | 10 | 2 |
| 2025 | 5 | 10 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Motor cooling shroud for fully reversible turbomachinery4 Aug 2026US 12,698,719 B2Howden Axial Fans Aps
- Configurable bi-directional airflow fan21 Apr 2026US 12,607,203 B2Cisco Technology, Inc.
- Axial fan rotor for reversible flow3 Feb 2026US 12,540,624 B1AMD Design, LLC
- Inflatable pump, inflatable assembly, and inflatable product13 Jan 2026US 12,523,230 B2Zhejiang Natural Outdoor Goods Inc.
- Power supply unit with consolidated different airflow direction fans11 Nov 2025US 12,467,463 B2Dell Products L. P.
- Methods and apparatus for controlling fan devices28 May 2026US 2026/0146621 A1Wangs Alliance Corporation
- Working machine30 Oct 2025US 2025/0334067 A1Kubota Corporation
- Air Conditioner23 Oct 2025US 2025/0327585 A1Gree Electric Appliances, Inc. of Zhuhai
- Power supply unit with consolidated different airflow direction fans9 Oct 2025US 2025/0314254 A1Dell Products L. P.
- Fan mounting deck for an air handling unit29 May 2025US 2025/0172161 A1Rheem Manufacturing Company
Most cited
By later US patents
- Bi-directional fan having asymmetric, reversible blades35US 6,116,856 APatterson Technique, Inc. · 2000
- Bi-directional automotive cooling fan22US 7,121,368 B22006
- Bidirectional thrust apparatus, system, and method20US 11,142,433 B2Vita Inclinata Technologies, Inc. · 2021
- Thrust generating apparatus for controlling attitude of movable body18US 10,288,075 B2Toyota Jidosha Kabushiki Kaisha · 2019
- Cooling apparatus for electrical equipment17US 6,152,699 ASansha Electric Manufacturing Company, Limited · 2000