F01N 1/003
Silencing apparatus characterised by method of silencing: by using dead chambers communicating
Official title: {by using dead chambers communicating with exhaust gas flow passages}
F01N1/003 (Silencing apparatus characterised by method of silencing: by using dead chambers communicating) appears on 243 US grants and 190 published applications in this corpus.
Search patents in F01N- Granted patents
- 243
- Published applications
- 190
- Assignees
- 141
- Inventors
- 512
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 0 |
| 2002 | 8 | 6 |
| 2003 | 6 | 5 |
| 2004 | 1 | 5 |
| 2005 | 4 | 15 |
| 2006 | 4 | 9 |
| 2007 | 4 | 12 |
| 2008 | 12 | 13 |
| 2009 | 10 | 9 |
| 2010 | 4 | 13 |
| 2011 | 16 | 6 |
| 2012 | 14 | 10 |
| 2013 | 5 | 3 |
| 2014 | 8 | 7 |
| 2015 | 3 | 3 |
| 2016 | 1 | 8 |
| 2017 | 10 | 6 |
| 2018 | 2 | 6 |
| 2019 | 8 | 19 |
| 2020 | 4 | 9 |
| 2021 | 10 | 7 |
| 2022 | 14 | 9 |
| 2023 | 10 | 6 |
| 2024 | 5 | 0 |
| 2025 | 4 | 1 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Muffler and method for making a muffler9 Dec 2025US 12,492,653 B2Purem GmbH
- Dual mode muffler21 Oct 2025US 12,448,907 B2Tenneco Automotive Operating Company Inc.
- Vehicle exhaust assemblies and methods therefor30 Sep 2025US 12,428,983 B2Braun GmbH
- Exhaust silencing device and system, vehicle, and exhaust silencing method2 Sep 2025US 12,404,790 B2Zhejiang Geely Holding Group Co., Ltd.
- Noise suppressor10 Sep 2024US 12,087,261 B2Mitsubishi Heavy Industries, Ltd.
- Fluid piping6 Aug 2026US 2026/0227020 A1Nissan Motor Co., Ltd.
- Exhaust Muffler12 Mar 2026US 2026/0071564 A1Tenneco Automotive Operating Company Inc.
- Vehicle exhaust assemblies and methods therefor1 Jan 2026US 2026/0002464 A1Braun GmbH
- Dual Mode Muffler27 Feb 2025US 2025/0067201 A1Tenneco Automotive Operating Company Inc.
- Sound reducer and method of making same30 Nov 2023US 2023/0383886 A1UMFOTEC ACOUSTIC SOLUTIONS GmbH
Most cited
By later US patents
- Combination spark arrestor and aspirating muffler129US 4,147,230 ANelson Industries, Inc. · 1979
- Flattened venturi, method and apparatus for making58US 4,690,245 AStemco Co., Ltd. · 1987
- Muffler57US 6,164,412 AArvin Industries, Inc. · 2000
- Packless silencer55US 4,287,962 AIndustrial Acoustics Company, Inc. · 1981
- Muffler with catalytic converter arrangement; and method53US 5,355,973 ADonaldson Company, Inc. · 1994