F04D 29/386
Skewed blades
Official title: {Skewed blades}
F04D29/386 (Skewed blades) appears on 96 US grants and 89 published applications in this corpus.
Search patents in F04D- Granted patents
- 96
- Published applications
- 89
- Assignees
- 72
- Inventors
- 234
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 2 |
| 2006 | 0 | 0 |
| 2007 | 1 | 5 |
| 2008 | 3 | 3 |
| 2009 | 1 | 0 |
| 2010 | 3 | 1 |
| 2011 | 2 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 0 | 2 |
| 2015 | 1 | 1 |
| 2016 | 2 | 3 |
| 2017 | 3 | 2 |
| 2018 | 1 | 8 |
| 2019 | 2 | 8 |
| 2020 | 5 | 7 |
| 2021 | 6 | 6 |
| 2022 | 6 | 7 |
| 2023 | 10 | 10 |
| 2024 | 7 | 4 |
| 2025 | 4 | 5 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fan wheel2 Jun 2026US 12,644,468 B2Mahle International GmbH
- Impeller for a duct24 Feb 2026US 12,560,177 B2Minetek Investments Pty Ltd
- High-efficiency cooling fan impeller10 Feb 2026US 12,546,332 B1Undada Company Limited
- Blade for a low-noise industrial axial fan, industrial axial fan and process for manufacturing a blade of an industrial axial fan30 Sep 2025US 12,429,065 B2Cofimco S.r.l.
- Electric propulsion device1 Jul 2025US 12,344,391 B2Hitachi, Ltd.
- Impeller and axial fan2 Jul 2026US 2026/0185536 A1Nidec Corporation
- Swept compressor blade, compressor, and gas turbine including same18 Jun 2026US 2026/0168509 A1Doosan Enerbility Co., Ltd.
- Composite Fan Blade and Fan Device21 May 2026US 2026/0139686 A1Cooler Master Co., Ltd.
- Impeller for a duct21 May 2026US 2026/0139687 A1Minetek Investments Pty Ltd
- Vaneaxial blower system including rotor fan having curved blades7 May 2026US 2026/0126053 A1
Most cited
By later US patents
- Swept turbomachinery blade99US 5,642,985 AUnited Technologies Corporation · 1997
- Low noise fan97US 4,358,245 ABolt Beranek and Newman Inc. · 1982
- Ultra-thin low noise axial flow fan for office automation machines61US 5,320,493 AIndustrial Technology Research Institute · 1994
- High-pumping, high-efficiency fan with forward-swept blades61US 5,769,607 AITT Automotive Electrical Systems, Inc. · 1998
- High strength fan56US 4,569,631 AAirflow Research and Manufacturing Corporation · 1986