F01N 1/00
Silencing apparatus characterised by method of silencing
F01N1/00 (Silencing apparatus characterised by method of silencing) appears on 2,530 US grants and 1,981 published applications in this corpus.
Search patents in F01N- Granted patents
- 2,530
- Published applications
- 1,981
- Assignees
- 925
- Inventors
- 4,631
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 22 | 0 |
| 1978 | 41 | 0 |
| 1979 | 20 | 0 |
| 1980 | 37 | 0 |
| 1981 | 26 | 0 |
| 1982 | 34 | 0 |
| 1983 | 19 | 0 |
| 1984 | 16 | 0 |
| 1985 | 19 | 0 |
| 1986 | 26 | 0 |
| 1987 | 21 | 0 |
| 1988 | 21 | 0 |
| 1989 | 29 | 0 |
| 1990 | 44 | 0 |
| 1991 | 40 | 0 |
| 1992 | 30 | 0 |
| 1993 | 44 | 0 |
| 1994 | 36 | 0 |
| 1995 | 43 | 0 |
| 1996 | 29 | 0 |
| 1997 | 37 | 0 |
| 1998 | 50 | 0 |
| 1999 | 54 | 0 |
| 2000 | 50 | 0 |
| 2001 | 45 | 17 |
| 2002 | 52 | 60 |
| 2003 | 56 | 55 |
| 2004 | 48 | 74 |
| 2005 | 47 | 92 |
| 2006 | 40 | 83 |
| 2007 | 32 | 84 |
| 2008 | 57 | 82 |
| 2009 | 52 | 80 |
| 2010 | 58 | 86 |
| 2011 | 81 | 65 |
| 2012 | 72 | 78 |
| 2013 | 70 | 75 |
| 2014 | 79 | 86 |
| 2015 | 80 | 89 |
| 2016 | 74 | 93 |
| 2017 | 102 | 109 |
| 2018 | 62 | 92 |
| 2019 | 102 | 113 |
| 2020 | 84 | 114 |
| 2021 | 78 | 91 |
| 2022 | 106 | 84 |
| 2023 | 108 | 66 |
| 2024 | 61 | 38 |
| 2025 | 53 | 40 |
| 2026 | 12 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 1/08Silencing apparatus characterised by method of silencing: by reducing exhaust energy by1,346
- F01N 1/02Silencing apparatus characterised by method of silencing: by using resonance757
- F01N 1/16Silencing apparatus characterised by method of silencing: by using movable parts476
- F01N 1/24Silencing apparatus characterised by method of silencing: by using sound-absorbing materials368
- F01N 1/06Silencing apparatus characterised by method of silencing: by using interference effect295
- F01N 1/003Silencing apparatus characterised by method of silencing: by using dead chambers communicating243
- F01N 1/14Silencing apparatus characterised by method of silencing: by adding air to exhaust76
Recent patents
- Decomposition chamber for aftertreatment system22 Sep 2026US 12,742,406 B2Cummins Emission Solutions Inc.
- Inlet silencer for a volumetric compressor and volumetric compressor equipped with it8 Sep 2026US 12,729,672 B2Atlas Copco Airpower, Naamloze Vennootschap
- Muffler for internal combustion engines25 Aug 2026US 12,716,373 B2Plaggio & C. S.P.A.
- Acoustic metamaterial-based muffler for exhaust noise reduction11 Aug 2026US 12,704,084 B2Ajou University Industry-Academic Cooperation Foundation
- Noise cancelling device21 Jul 2026US 12,688,841 B1King Fahd University of Petroleum and Minerals
- Containerized ultra-low nox diesel engine generator set with roof-mounted selective catalytic reduction system8 Oct 2026US 2026/0309075 A1Industrial Service Solutions WC, Inc.
- Muffler system that internally adjustably regulates tone, decibel level, and pressure levels1 Oct 2026US 2026/0298117 A1
- Exhaust pipe structure1 Oct 2026US 2026/0298118 A1Mazda Motor Corporation
- Decomposition chamber for aftertreatment system1 Oct 2026US 2026/0298121 A1Cummins Emission Solutions Inc.
- Coupling device, valve system and method for operating a valve system10 Sep 2026US 2026/0266207 A1Akrapovic d.d.
Most cited
By later US patents
- Outlet silencer and heat recovery structures for gas turbine177US 6,851,514 B2Air Handling Engineering Ltd. · 2005
- Exhaust muffler174US 4,880,078 AHonda Giken Kogyo Kabushiki Kaisha · 1989
- Device for silencing firearms160US 4,576,083 A1986
- Combination spark arrestor and aspirating muffler129US 4,147,230 ANelson Industries, Inc. · 1979
- Straight through muffler with conically-ended output passage126US 6,158,546 ATenneco Automotive Inc. · 2000