F04D 29/44
Fluid-guiding means
Official title: Fluid-guiding means, e.g. diffusers
F04D29/44 (Fluid-guiding means) appears on 2,561 US grants and 2,703 published applications in this corpus.
Search patents in F04D- Granted patents
- 2,561
- Published applications
- 2,703
- Assignees
- 900
- Inventors
- 4,823
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 14 | 0 |
| 1978 | 10 | 0 |
| 1979 | 9 | 0 |
| 1980 | 12 | 0 |
| 1981 | 13 | 0 |
| 1982 | 11 | 0 |
| 1983 | 19 | 0 |
| 1984 | 15 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 16 | 0 |
| 1988 | 27 | 0 |
| 1989 | 35 | 0 |
| 1990 | 20 | 0 |
| 1991 | 18 | 0 |
| 1992 | 32 | 0 |
| 1993 | 18 | 0 |
| 1994 | 24 | 0 |
| 1995 | 15 | 0 |
| 1996 | 21 | 0 |
| 1997 | 13 | 0 |
| 1998 | 17 | 0 |
| 1999 | 27 | 0 |
| 2000 | 23 | 0 |
| 2001 | 23 | 6 |
| 2002 | 18 | 19 |
| 2003 | 31 | 29 |
| 2004 | 26 | 42 |
| 2005 | 17 | 36 |
| 2006 | 26 | 35 |
| 2007 | 23 | 47 |
| 2008 | 17 | 49 |
| 2009 | 25 | 48 |
| 2010 | 22 | 87 |
| 2011 | 38 | 65 |
| 2012 | 63 | 84 |
| 2013 | 58 | 89 |
| 2014 | 60 | 109 |
| 2015 | 70 | 133 |
| 2016 | 55 | 151 |
| 2017 | 137 | 171 |
| 2018 | 102 | 169 |
| 2019 | 160 | 186 |
| 2020 | 192 | 191 |
| 2021 | 161 | 206 |
| 2022 | 190 | 164 |
| 2023 | 170 | 181 |
| 2024 | 197 | 166 |
| 2025 | 156 | 120 |
| 2026 | 80 | 120 |
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.
- Pump diffuser anti-rotation and alignment assembly6 Oct 2026US 12,753,774 B2Pentair Flow Technologies, LLC
- Inflating module for use with an inflatable object6 Oct 2026US RE51,054 E1Team Worldwide Corporation
- Blowing device and blowing device operating method29 Sep 2026US 12,747,738 B2Samsung Electronics Co., Ltd.
- Centrifugal air blower8 Oct 2026US 2026/0309159 A1Shinano Kenshi Co., Ltd.
- Fan motor8 Oct 2026US 2026/0309164 A1LG Electronics Inc.
- Household appliance having an improved fan and motor assembly and fan and motor assembly for same8 Oct 2026US 2026/0309165 A1Omachron Intellectual Property Inc.
- Systems and methods for controlling capacity of a compressor8 Oct 2026US 2026/0309355 A1Tyco Fire & Security GmbH
- Spin-resistant diffuser for electric submersible pump1 Oct 2026US 2026/0298264 A1Halliburton Energy Services.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
- Blood pump with disposable rotor assembly246US 5,393,207 ANimbus, Inc. · 1995
- Blood pump without bearing222US 6,623,475 B1Impella CardioSystems AG · 2003
- Electrohydraulic energy converter for cardiac assist devices and artificial hearts193US 5,346,458 A1994