F01N 1/166
For changing the flow path through the silencer or for adjusting the
Official title: {for changing the flow path through the silencer or for adjusting the dimensions of a chamber or a pipe (F01N1/165 takes precedence)}
F01N1/166 (For changing the flow path through the silencer or for adjusting the) appears on 214 US grants and 189 published applications in this corpus.
Search patents in F01N- Granted patents
- 214
- Published applications
- 189
- Assignees
- 98
- Inventors
- 472
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 2 |
| 2002 | 6 | 10 |
| 2003 | 11 | 3 |
| 2004 | 5 | 7 |
| 2005 | 4 | 8 |
| 2006 | 4 | 12 |
| 2007 | 2 | 12 |
| 2008 | 9 | 11 |
| 2009 | 5 | 4 |
| 2010 | 9 | 10 |
| 2011 | 5 | 6 |
| 2012 | 5 | 6 |
| 2013 | 5 | 3 |
| 2014 | 2 | 7 |
| 2015 | 7 | 7 |
| 2016 | 7 | 11 |
| 2017 | 14 | 14 |
| 2018 | 5 | 8 |
| 2019 | 12 | 19 |
| 2020 | 12 | 9 |
| 2021 | 12 | 7 |
| 2022 | 11 | 5 |
| 2023 | 8 | 5 |
| 2024 | 2 | 0 |
| 2025 | 4 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Variable exhaust control system11 Nov 2025US 12,467,399 B2
- Dual mode muffler21 Oct 2025US 12,448,907 B2Tenneco Automotive Operating Company Inc.
- Exhaust silencing device and system, vehicle, and exhaust silencing method2 Sep 2025US 12,404,790 B2Zhejiang Geely Holding Group Co., Ltd.
- Convertible silencer15 Jul 2025US 12,359,594 B2Discovery Energy, LLC
- Exhaust system for an internal combustion engine21 May 2024US 11,988,124 B2Ferrari S.P. A.
- Convertible silencer25 Dec 2025US 2025/0389215 A1Discovery Energy, LLC
- Dual Mode Muffler27 Feb 2025US 2025/0067201 A1Tenneco Automotive Operating Company Inc.
- Convertible silencer6 Feb 2025US 2025/0043706 A1Discovery Energy, LLC
- Muffler system with pneumatically actuated bypass valve23 Nov 2023US 2023/0374923 A1
- Exhaust silencing device and system, vehicle, and exhaust silencing method6 Jul 2023US 2023/0212968 A1Zhejiang Geely Holding Group Co., Ltd.
Most cited
By later US patents
- Bypass muffler55US 5,959,263 ABiggs Manufacturing, Inc. · 1999
- Automobile exhaust noise suppressor54US 5,614,699 ANissan Motor Co., Ltd. · 1997
- Engine-control apparatus48US 4,926,636 AMazda Motor Corporation · 1990
- Exhaust silencer for an internal combustion engine and the method of operation44US 6,349,541 B1DaimlerChrysler AG · 2002
- Resonator for internal combustion engines42US 4,546,733 ANippondenso Co., Ltd. · 1985