F02K 1/827
Sound absorbing structures or liners
Official title: {Sound absorbing structures or liners}
F02K1/827 (Sound absorbing structures or liners) appears on 464 US grants and 498 published applications in this corpus.
Search patents in F02K- Granted patents
- 464
- Published applications
- 498
- Assignees
- 126
- Inventors
- 865
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 2 |
| 2002 | 5 | 6 |
| 2003 | 4 | 3 |
| 2004 | 5 | 6 |
| 2005 | 5 | 4 |
| 2006 | 1 | 14 |
| 2007 | 6 | 11 |
| 2008 | 8 | 15 |
| 2009 | 8 | 5 |
| 2010 | 7 | 15 |
| 2011 | 14 | 10 |
| 2012 | 7 | 14 |
| 2013 | 11 | 27 |
| 2014 | 20 | 19 |
| 2015 | 18 | 31 |
| 2016 | 14 | 17 |
| 2017 | 22 | 14 |
| 2018 | 22 | 26 |
| 2019 | 20 | 22 |
| 2020 | 23 | 50 |
| 2021 | 18 | 25 |
| 2022 | 40 | 39 |
| 2023 | 29 | 31 |
| 2024 | 45 | 40 |
| 2025 | 30 | 32 |
| 2026 | 22 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Composite skins having variable hole sizes and shapes formed using photomachining15 Sep 2026US 12,736,017 B2Rtx Corporation
- Method for manufacturing an acoustic attenuation structure with control of the positioning of an acoustic skin8 Sep 2026US 12,728,617 B2Safran
- Rotorcraft with powerplant exhaust sound attenuation25 Aug 2026US 12,715,576 B2Pratt & Whitney Canada Corp.
- Optimised honeycomb core and acoustic attenuation panel comprising it for an aircraft turbomachine4 Aug 2026US 12,698,739 B2Safran Nacelles
- Blocker door equipped with large cavity acoustic structure4 Aug 2026US 12,698,745 B2The Boeing Company
- Sound absorption device3 Sep 2026US 2026/0258769 A1Safran Nacelles
- Acoustic damper assembly for a gas turbine engine13 Aug 2026US 2026/0235072 A1General Electric Company
- Aircraft propulsion system with acoustic treatment along bypass flowpath30 Jul 2026US 2026/0217378 A1Rtx Corporation
- Gas turbine engine with forward swept outlet guide vanes30 Jul 2026US 2026/0218668 A1General Electric Company
- Aircraft propulsion system with acoustically treated propulsor rotating structure16 Jul 2026US 2026/0200587 A1Rtx Corporation
Most cited
By later US patents
- Sound suppressor exhaust structure175US 5,717,172 ANorthrop Grumman Corporation · 1998
- Exhaust silencer for microturbines170US 7,980,357 B2OfficePower, Inc. · 2011
- Tortuous path quiet exhaust eductor system134US 6,615,576 B2Honeywell International Inc. · 2003
- Multi-layer acoustic linings113US 4,298,090 AROLLS-ROYCE plc · 1981
- Honeycomb noise attenuation structure110US 5,041,323 ARohr Industries, Inc. · 1991