F04D 29/547
Having a special shape in order to influence fluid flow
Official title: {having a special shape in order to influence fluid flow}
F04D29/547 (Having a special shape in order to influence fluid flow) appears on 256 US grants and 273 published applications in this corpus.
Search patents in F04D- Granted patents
- 256
- Published applications
- 273
- Assignees
- 153
- Inventors
- 578
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 6 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 3 |
| 2003 | 5 | 5 |
| 2004 | 3 | 2 |
| 2005 | 3 | 3 |
| 2006 | 1 | 3 |
| 2007 | 0 | 10 |
| 2008 | 4 | 5 |
| 2009 | 4 | 1 |
| 2010 | 3 | 5 |
| 2011 | 1 | 10 |
| 2012 | 1 | 5 |
| 2013 | 5 | 16 |
| 2014 | 5 | 8 |
| 2015 | 8 | 13 |
| 2016 | 6 | 19 |
| 2017 | 15 | 13 |
| 2018 | 12 | 24 |
| 2019 | 21 | 22 |
| 2020 | 25 | 20 |
| 2021 | 20 | 20 |
| 2022 | 19 | 9 |
| 2023 | 21 | 19 |
| 2024 | 17 | 11 |
| 2025 | 13 | 14 |
| 2026 | 3 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Axial fan and housing assembly and methods of use thereof30 Dec 2025US 12,510,097 B1Regal Beloit America, Inc.
- Fan having a step diffuser2 Dec 2025US 12,486,857 B2Ziehl-Abegg SE
- High-speed booster fan module and portable fan3 Sep 2026US 2026/0258815 A1Guangdong Aoyun Technology Co., Ltd.
- Turbomachine having a flow duct9 Jul 2026US 2026/0193989 A1
- Struts for cooling fan module11 Jun 2026US 2026/0160266 A1Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg
- Portable fan4 Jun 2026US 2026/0153091 A1Shenzhen Jisu Technology Co., Ltd
- Portable fan4 Jun 2026US 2026/0153092 A1Shenzhen Jisu Technology Co., Ltd
Most cited
By later US patents
- Propulsive thrust ring system117US 5,393,197 ALemont Aircraft Corporation · 1995
- Heat exchange apparatus including a toroidal-type radiator108US 4,180,130 AInternational Harvester Company · 1979
- Heat exchange apparatus including a toroidal-type radiator107US 4,184,541 AInternational Harvester Company · 1980
- Cooling fan using Coanda effect to reduce recirculation105US 7,478,993 B2Valeo · 2009
- Heat exchange apparatus including a toroidal-type radiator103US 4,136,735 AInternational Harvester Company · 1979