F01N 1/084
The exhaust gases flowing through the silencer two or more times longitudinally
Official title: {the exhaust gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes}
F01N1/084 (The exhaust gases flowing through the silencer two or more times longitudinally) appears on 338 US grants and 224 published applications in this corpus.
Search patents in F01N- Granted patents
- 338
- Published applications
- 224
- Assignees
- 149
- Inventors
- 641
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 13 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 4 | 0 |
| 1998 | 14 | 0 |
| 1999 | 7 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 3 |
| 2002 | 7 | 13 |
| 2003 | 15 | 4 |
| 2004 | 7 | 14 |
| 2005 | 3 | 8 |
| 2006 | 6 | 20 |
| 2007 | 4 | 15 |
| 2008 | 14 | 16 |
| 2009 | 7 | 14 |
| 2010 | 16 | 11 |
| 2011 | 15 | 8 |
| 2012 | 7 | 10 |
| 2013 | 10 | 7 |
| 2014 | 7 | 10 |
| 2015 | 18 | 9 |
| 2016 | 7 | 12 |
| 2017 | 14 | 3 |
| 2018 | 0 | 6 |
| 2019 | 4 | 12 |
| 2020 | 7 | 10 |
| 2021 | 8 | 7 |
| 2022 | 14 | 5 |
| 2023 | 8 | 2 |
| 2024 | 2 | 3 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
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- Marine drives having a muffler for tertiary exhaust outlet24 Oct 2023US 11,795,858 B1Brunswick Corporation
- Fuel cell exhaust gas system7 Aug 2025US 2025/0253359 A1Purem GmbH
- Exhaust device1 May 2025US 2025/0137393 A1Kawasaki Motors, Ltd.
- Muffler structure23 May 2024US 2024/0167404 A1Honda Motor Co., Ltd.
- Muffler for generating a sporty and rhythmic sound and a vehicle equipped with the same28 Mar 2024US 2024/0102408 A1Hyundai Motor Company
- Exhaust sound attenuation and control system1 Feb 2024US 2024/0035405 A1
Most cited
By later US patents
- Silencer83US 6,312,650 B1Silentor Holding A/S · 2001
- Compressor muffler77US 4,330,239 ATecumseh Products Company · 1982
- Catalytic converter for motorcycles73US 5,376,341 ACorning Incorporated · 1994
- Muffler57US 6,164,412 AArvin Industries, Inc. · 2000
- Bypass muffler55US 5,959,263 ABiggs Manufacturing, Inc. · 1999