F01N 1/165
For adjusting flow area
Official title: {for adjusting flow area}
F01N1/165 (For adjusting flow area) appears on 165 US grants and 161 published applications in this corpus.
Search patents in F01N- Granted patents
- 165
- Published applications
- 161
- Assignees
- 97
- Inventors
- 350
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 3 | 6 |
| 2003 | 4 | 4 |
| 2004 | 4 | 6 |
| 2005 | 3 | 6 |
| 2006 | 2 | 8 |
| 2007 | 3 | 12 |
| 2008 | 5 | 7 |
| 2009 | 3 | 5 |
| 2010 | 6 | 9 |
| 2011 | 4 | 3 |
| 2012 | 2 | 3 |
| 2013 | 2 | 4 |
| 2014 | 6 | 2 |
| 2015 | 4 | 6 |
| 2016 | 5 | 9 |
| 2017 | 6 | 12 |
| 2018 | 4 | 11 |
| 2019 | 14 | 11 |
| 2020 | 6 | 10 |
| 2021 | 12 | 12 |
| 2022 | 12 | 3 |
| 2023 | 6 | 5 |
| 2024 | 3 | 2 |
| 2025 | 3 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Exhaust system for an internal combustion engine21 May 2024US 11,988,124 B2Ferrari S.P. A.
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- Convertible silencer25 Dec 2025US 2025/0389215 A1Discovery Energy, LLC
- Acoustic efficiency27 Feb 2025US 2025/0067202 A1McLaren Automotive Limited
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- Exhaust valve and method for manufacturing same23 May 2024US 2024/0167405 A1Sankei Giken Kogyo Co., Ltd.
Most cited
By later US patents
- Automobile exhaust noise suppressor54US 5,614,699 ANissan Motor Co., Ltd. · 1997
- Exhaust system for internal combustion engines51US 5,388,408 ALawrence-Keech Inc. · 1995
- Exhaust silencer for an internal combustion engine and the method of operation44US 6,349,541 B1DaimlerChrysler AG · 2002
- Engine exhaust noise suppressor42US 5,984,045 ANissan Motor Co., Ltd. · 1999
- Performance responsive muffler for internal combustion engines36US 4,903,486 A1990