F04D 29/664
By means of sound absorbing material
Official title: {by means of sound absorbing material}
F04D29/664 (By means of sound absorbing material) appears on 295 US grants and 326 published applications in this corpus.
Search patents in F04D- Granted patents
- 295
- Published applications
- 326
- Assignees
- 221
- Inventors
- 798
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 6 |
| 2003 | 4 | 2 |
| 2004 | 1 | 3 |
| 2005 | 1 | 10 |
| 2006 | 3 | 7 |
| 2007 | 4 | 4 |
| 2008 | 3 | 11 |
| 2009 | 5 | 7 |
| 2010 | 5 | 10 |
| 2011 | 11 | 8 |
| 2012 | 8 | 9 |
| 2013 | 9 | 15 |
| 2014 | 8 | 19 |
| 2015 | 9 | 15 |
| 2016 | 11 | 15 |
| 2017 | 16 | 22 |
| 2018 | 11 | 17 |
| 2019 | 24 | 25 |
| 2020 | 18 | 18 |
| 2021 | 17 | 18 |
| 2022 | 16 | 15 |
| 2023 | 12 | 18 |
| 2024 | 11 | 13 |
| 2025 | 18 | 21 |
| 2026 | 14 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Torso aerator22 Sep 2026US 12,742,458 B2
- Portable fan device1 Sep 2026US 12,723,591 B2
- Detuning device and method18 Aug 2026US 12,710,059 B2Sulzer Management AG
- Blower / vac tools with improved fan blade noise11 Aug 2026US 12,704,128 B2Milwaukee Electric Tool Corporation
- Fan cover16 Jun 2026US 12,655,854 B2ABB Schweiz AG
- Variable bleed valve assemblies8 Oct 2026US 2026/0309077 A1General Electric Company
- Noise attenuation for nuclear imaging system27 Aug 2026US 2026/0251158 A1Siemens Medical Solutions USA, Inc.
- Compressor-adapted enclosure and compressor unit6 Aug 2026US 2026/0226899 A1Mitsubishi Heavy Industries, Ltd.
- Gas turbine engine with forward swept outlet guide vanes30 Jul 2026US 2026/0218668 A1General Electric Company
- Fan, air conditioning outdoor unit, and air conditioning apparatus16 Jul 2026US 2026/0201901 A1Daikin Industries, Ltd.
Most cited
By later US patents
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017
- Mounting body127US 6,216,691 B1ResMed Limited · 2001
- Device and method for gas turbine unlocking112US 9,845,730 B2Nuovo Pignone S.p.A. · 2017
- Blower pipe with silencer111US 5,841,080 AKioritz Corporation · 1998
- Electric blower having improved return passage for discharged air flow97US 5,110,266 AHitachi, Ltd. · 1992