F01N 1/02
Silencing apparatus characterised by method of silencing: by using resonance
Official title: by using resonance
F01N1/02 (Silencing apparatus characterised by method of silencing: by using resonance) appears on 757 US grants and 639 published applications in this corpus.
Search patents in F01N- Granted patents
- 757
- Published applications
- 639
- Assignees
- 353
- Inventors
- 1,611
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 5 | 0 |
| 1980 | 12 | 0 |
| 1981 | 8 | 0 |
| 1982 | 8 | 0 |
| 1983 | 7 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 8 | 0 |
| 1990 | 20 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 14 | 0 |
| 1994 | 8 | 0 |
| 1995 | 8 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 16 | 0 |
| 1999 | 14 | 0 |
| 2000 | 11 | 0 |
| 2001 | 5 | 0 |
| 2002 | 11 | 13 |
| 2003 | 15 | 16 |
| 2004 | 20 | 25 |
| 2005 | 14 | 27 |
| 2006 | 12 | 19 |
| 2007 | 14 | 25 |
| 2008 | 11 | 16 |
| 2009 | 17 | 25 |
| 2010 | 14 | 24 |
| 2011 | 21 | 21 |
| 2012 | 23 | 24 |
| 2013 | 23 | 21 |
| 2014 | 22 | 24 |
| 2015 | 19 | 21 |
| 2016 | 18 | 34 |
| 2017 | 35 | 43 |
| 2018 | 23 | 22 |
| 2019 | 30 | 41 |
| 2020 | 22 | 59 |
| 2021 | 27 | 49 |
| 2022 | 60 | 30 |
| 2023 | 44 | 21 |
| 2024 | 24 | 16 |
| 2025 | 15 | 10 |
| 2026 | 3 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Acoustic metamaterial-based muffler for exhaust noise reduction11 Aug 2026US 12,704,084 B2Ajou University Industry-Academic Cooperation Foundation
- Acoustic metamaterial-based muffler for broadband exhaust noise reduction of internal combustion engines14 Jul 2026US 12,680,484 B2Ajou University Industry-Academic Cooperation Foundation
- Straddle-type vehicle17 Feb 2026US 12,552,486 B2Zhejiang CFMOTO Power Co., Ltd.
- Tunable exhaust system16 Dec 2025US 12,497,913 B2Advanced Flow Engineering, Inc.
- Car provided with an internal combustion engine having a side exhaust9 Dec 2025US 12,491,762 B2Ferrari S.P. A.
- 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
- Muffler for Noise Reduction of Heat Dissipation Fan in Computer System27 Aug 2026US 2026/0251159 A1Celanese Mercury Holdings Inc.
- Fluid piping6 Aug 2026US 2026/0227020 A1Nissan Motor Co., Ltd.
- Exhaust Assembly23 Jul 2026US 2026/0210277 A1AGCO International GmbH
Most cited
By later US patents
- Exhaust muffler174US 4,880,078 AHonda Giken Kogyo Kabushiki Kaisha · 1989
- Straight through muffler with conically-ended output passage126US 6,158,546 ATenneco Automotive Inc. · 2000
- Muffler method and apparatus92US 4,064,962 AGarlock Inc. · 1977
- Exhaust silencer for a railway locomotive81US 4,203,503 ACentro Richerche Fiat S.p.A. · 1980
- Exhaust silencer for an agricultural tractor78US 4,209,076 ACentro Ricerche Fiat S.p.A. · 1980