F04D 29/661
Especially adapted for elastic fluid pumps
Official title: {especially adapted for elastic fluid pumps}
F04D29/661 (Especially adapted for elastic fluid pumps) appears on 2,600 US grants and 2,907 published applications in this corpus.
Search patents in F04D- Granted patents
- 2,600
- Published applications
- 2,907
- Assignees
- 964
- Inventors
- 5,845
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 15 | 0 |
| 1992 | 19 | 0 |
| 1993 | 16 | 0 |
| 1994 | 17 | 0 |
| 1995 | 24 | 0 |
| 1996 | 22 | 0 |
| 1997 | 24 | 0 |
| 1998 | 23 | 0 |
| 1999 | 19 | 0 |
| 2000 | 36 | 0 |
| 2001 | 35 | 17 |
| 2002 | 35 | 35 |
| 2003 | 45 | 38 |
| 2004 | 21 | 52 |
| 2005 | 31 | 67 |
| 2006 | 36 | 66 |
| 2007 | 33 | 62 |
| 2008 | 27 | 81 |
| 2009 | 31 | 76 |
| 2010 | 54 | 87 |
| 2011 | 47 | 75 |
| 2012 | 76 | 88 |
| 2013 | 50 | 112 |
| 2014 | 76 | 147 |
| 2015 | 88 | 167 |
| 2016 | 87 | 172 |
| 2017 | 136 | 183 |
| 2018 | 147 | 217 |
| 2019 | 218 | 235 |
| 2020 | 220 | 154 |
| 2021 | 159 | 133 |
| 2022 | 169 | 127 |
| 2023 | 130 | 138 |
| 2024 | 130 | 130 |
| 2025 | 130 | 136 |
| 2026 | 74 | 112 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CPAP device6 Oct 2026US 12,752,066 B2Murata Manufacturing Co., Ltd.
- Axial fan assembly including an intermediate shroud6 Oct 2026US 12,753,773 B2Regal Beloit America, Inc.
- Side-channel machine (compressor, vacuum pump or blower) having an extraction duct in the stripper29 Sep 2026US 12,747,732 B2Gardner Denver Deutschland GmbH
- Torso aerator22 Sep 2026US 12,742,458 B2
- Fan casing, blower assembly, and vehicle air conditioning system15 Sep 2026US 12,738,802 B2Luxshare Intelligent Manufacture Technology (Changshu) Co., Ltd
- Variable bleed valve assemblies8 Oct 2026US 2026/0309077 A1General Electric Company
- Noise reduction air inlet bypass recirculation structure of compressor8 Oct 2026US 2026/0309167 A1Harbin Engineering University
- Rotor for a turbomachine, turbomachine, and method for balancing a rotor of a turbomachine1 Oct 2026US 2026/0298094 A1Accelleron Switzerland Ltd.
- Techniques for Using Floodlight LEDs When Imaging Sensors Have an Insufficient Level of Detail for Identifying Hand Gestures, and Mixed-Reality Systems and Methods of Using These Techniques24 Sep 2026US 2026/0292120 A1Meta Platforms Technologies, LLC
- Gas turbine engine with acoustic spacing of the fan blades and outlet guide vanes17 Sep 2026US 2026/0275938 A1General Electric Company
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Blower with bearing tube333US 8,636,479 B2ResMed Motor Technologies Inc. · 2014
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017
- Vibration isolating seal for mounting fans and blowers154US 4,568,243 ABarry Wright Corporation · 1986
- Reduction of turbomachinery noise149US 6,004,095 AMassachusetts Institute of Technology · 1999