F04D 29/326
Comprising a rotating shroud
Official title: {comprising a rotating shroud}
F04D29/326 (Comprising a rotating shroud) appears on 258 US grants and 254 published applications in this corpus.
Search patents in F04D- Granted patents
- 258
- Published applications
- 254
- Assignees
- 158
- Inventors
- 539
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 6 | 3 |
| 2003 | 6 | 8 |
| 2004 | 0 | 5 |
| 2005 | 5 | 7 |
| 2006 | 5 | 6 |
| 2007 | 4 | 6 |
| 2008 | 1 | 3 |
| 2009 | 4 | 4 |
| 2010 | 4 | 7 |
| 2011 | 0 | 6 |
| 2012 | 4 | 9 |
| 2013 | 6 | 12 |
| 2014 | 2 | 12 |
| 2015 | 7 | 11 |
| 2016 | 9 | 10 |
| 2017 | 8 | 12 |
| 2018 | 12 | 8 |
| 2019 | 16 | 13 |
| 2020 | 18 | 13 |
| 2021 | 12 | 10 |
| 2022 | 15 | 15 |
| 2023 | 13 | 20 |
| 2024 | 19 | 14 |
| 2025 | 14 | 16 |
| 2026 | 8 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Axial fan assembly including an intermediate shroud6 Oct 2026US 12,753,773 B2Regal Beloit America, Inc.
- Blower / vac tools with improved fan blade noise11 Aug 2026US 12,704,128 B2Milwaukee Electric Tool Corporation
- Propulsor fan and drive system23 Jun 2026US 12,662,943 B2Whisper Aero Inc.
- Diagonal fan19 May 2026US 12,631,198 B2Delta Electronics, Inc.
- Air moving devices, aerodynamic rotor, and methods14 Apr 2026US 12,601,357 B2Whisper Aero Inc.
- Fan blade structure and fan device13 Aug 2026US 2026/0235130 A1Cooler Master Co., Ltd.
- Propulsion device6 Aug 2026US 2026/0225741 A1Hitachi, Ltd.
- Fan device23 Jul 2026US 2026/0210377 A1Cooler Master Co., Ltd.
- Anti-pressure-relief structure for fan23 Jul 2026US 2026/0210378 A1Asia Vital Components Co., Ltd.
- Fan device and guiding component16 Jul 2026US 2026/0201904 A1Cooler Master Co., Ltd.
Most cited
By later US patents
- Blade for axial fan133US 5,437,541 A1995
- Dynamically sealing ring fan shroud assembly105US 6,599,088 B2BorgWarner Inc. · 2003
- Fan blade with curved planform and high-lift airfoil having bulbous leading edge98US 5,624,234 AITT Automotive Electrical Systems, Inc. · 1997
- Low noise fan97US 4,358,245 ABolt Beranek and Newman Inc. · 1982
- Housing with recirculation control for use with banded axial-flow fans95US 5,489,186 AAirflow Research and Manufacturing Corporation · 1996