F04D 29/441
Especially adapted for elastic fluid pumps
Official title: {especially adapted for elastic fluid pumps}
F04D29/441 (Especially adapted for elastic fluid pumps) appears on 1,469 US grants and 1,696 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,469
- Published applications
- 1,696
- Assignees
- 543
- Inventors
- 3,054
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 13 | 0 |
| 1990 | 8 | 0 |
| 1991 | 3 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 12 | 0 |
| 2001 | 17 | 3 |
| 2002 | 12 | 14 |
| 2003 | 21 | 12 |
| 2004 | 13 | 23 |
| 2005 | 7 | 24 |
| 2006 | 13 | 16 |
| 2007 | 13 | 31 |
| 2008 | 10 | 29 |
| 2009 | 15 | 25 |
| 2010 | 13 | 55 |
| 2011 | 22 | 32 |
| 2012 | 39 | 50 |
| 2013 | 40 | 55 |
| 2014 | 30 | 65 |
| 2015 | 39 | 84 |
| 2016 | 33 | 105 |
| 2017 | 82 | 107 |
| 2018 | 66 | 117 |
| 2019 | 103 | 114 |
| 2020 | 128 | 133 |
| 2021 | 113 | 128 |
| 2022 | 121 | 107 |
| 2023 | 96 | 118 |
| 2024 | 117 | 99 |
| 2025 | 100 | 76 |
| 2026 | 44 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Additively manufactured heat exchanger and diffuser pipe coupled to a compressor stage6 Oct 2026US 12,752,921 B2Hamilton Sundstrand Corporation
- Motorized compressor device with air bearing having reduced axial and radial stack-up6 Oct 2026US 12,753,707 B2Garrett Transportation I Inc.
- Aircraft gas turbine engine impeller with a trailing edge that is non-linear or angled or irregularly-shaped25 Aug 2026US 12,716,424 B2Pratt & Whitney Canada Corp.
- Neck fan18 Aug 2026US 12,710,047 B1Shenzhen Jisu Technology Co., Ltd
- Blower21 Jul 2026US 12,687,175 B2LG Electronics Inc.
- Centrifugal air blower8 Oct 2026US 2026/0309159 A1Shinano Kenshi Co., Ltd.
- Fan motor8 Oct 2026US 2026/0309164 A1LG Electronics Inc.
- Air treatment device24 Sep 2026US 2026/0286975 A1Shenzhen Chenbei Technology Co., Ltd.
- Duct ventilation fan24 Sep 2026US 2026/0287191 A1Mitsubishi Electric Corporation
- Impeller17 Sep 2026US 2026/0276000 A1Honeywell International Inc.
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
- Air guide assembly for an electric motor and methods of making147US 5,296,769 AAB Electrolux · 1994
- Fan124US 8,092,166 B2Dyson Technology Limited · 2012
- Cooler and display device having the same113US 8,254,121 B2Samsung Electronics Co., Ltd. · 2012