F04D 29/281
For fans or blowers
Official title: {for fans or blowers}
F04D29/281 (For fans or blowers) appears on 1,477 US grants and 1,759 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,477
- Published applications
- 1,759
- Assignees
- 655
- Inventors
- 3,064
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 8 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 12 | 0 |
| 1998 | 17 | 0 |
| 1999 | 15 | 0 |
| 2000 | 20 | 0 |
| 2001 | 19 | 3 |
| 2002 | 20 | 33 |
| 2003 | 34 | 30 |
| 2004 | 21 | 33 |
| 2005 | 20 | 44 |
| 2006 | 26 | 46 |
| 2007 | 25 | 38 |
| 2008 | 19 | 37 |
| 2009 | 15 | 52 |
| 2010 | 16 | 27 |
| 2011 | 26 | 28 |
| 2012 | 31 | 54 |
| 2013 | 11 | 56 |
| 2014 | 30 | 61 |
| 2015 | 46 | 105 |
| 2016 | 51 | 112 |
| 2017 | 60 | 126 |
| 2018 | 94 | 111 |
| 2019 | 119 | 129 |
| 2020 | 105 | 96 |
| 2021 | 86 | 119 |
| 2022 | 109 | 99 |
| 2023 | 88 | 88 |
| 2024 | 99 | 101 |
| 2025 | 82 | 62 |
| 2026 | 33 | 69 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air purification device capable of discharging air bidirectionally1 Sep 2026US 12,722,108 B1Hiso Inc
- Blower18 Aug 2026US 12,710,046 B2Shinano Kenshi Co., Ltd.
- Impeller18 Aug 2026US 12,710,052 B2Delta Electronics, Inc.
- Fan assembly11 Aug 2026US 12,704,129 B2Illinois Tool Works Inc.
- Centrifugal fan11 Aug 2026US 12,704,130 B2Mabuchi Motor Co., Ltd.
- Air treatment device24 Sep 2026US 2026/0286975 A1Shenzhen Chenbei Technology Co., Ltd.
- Fan assembly including an optimised motor24 Sep 2026US 2026/0291311 A1|.M.E. Industria Motori Elettrici S.P.A.
- Centrifugal fan or compressor composite impeller with abrasion resistance17 Sep 2026US 2026/0275998 A1Howden Turbo GmbH
- Low-noise fan for information handling systems17 Sep 2026US 2026/0276007 A1Dell Products L. P.
- Power conversion arrangement with cooling fan3 Sep 2026US 2026/0257573 A1BRUSA Elektronik AG
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Medical ventilator268US 6,543,449 B1Respironics, Inc. · 2003
- Portable drag compressor powered mechanical ventilator220US 5,868,133 ABird Products Corporation · 1999
- Robotic vacuum cleaner206US 7,079,923 B2F Robotics Acquisitions Ltd. · 2006
- Portable drag compressor powered mechanical ventilator201US 6,877,511 B2Bird Products Corporation · 2005