F01N 1/161
For adjusting resonance or dead chambers or passages to resonance or dead
Official title: {for adjusting resonance or dead chambers or passages to resonance or dead chambers}
F01N1/161 (For adjusting resonance or dead chambers or passages to resonance or dead) appears on 114 US grants and 120 published applications in this corpus.
Search patents in F01N- Granted patents
- 114
- Published applications
- 120
- Assignees
- 64
- Inventors
- 260
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 2 |
| 2006 | 0 | 2 |
| 2007 | 0 | 2 |
| 2008 | 1 | 3 |
| 2009 | 2 | 1 |
| 2010 | 2 | 4 |
| 2011 | 5 | 4 |
| 2012 | 3 | 5 |
| 2013 | 4 | 4 |
| 2014 | 2 | 1 |
| 2015 | 3 | 5 |
| 2016 | 4 | 5 |
| 2017 | 11 | 17 |
| 2018 | 3 | 7 |
| 2019 | 14 | 14 |
| 2020 | 11 | 13 |
| 2021 | 8 | 9 |
| 2022 | 12 | 5 |
| 2023 | 12 | 8 |
| 2024 | 3 | 3 |
| 2025 | 5 | 4 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Muffler for internal combustion engines25 Aug 2026US 12,716,373 B2Plaggio & C. S.P.A.
- Noise cancelling device21 Jul 2026US 12,688,841 B1King Fahd University of Petroleum and Minerals
- Dual mode muffler21 Oct 2025US 12,448,907 B2Tenneco Automotive Operating Company Inc.
- Coupling device, valve system and method for assembling a coupling device14 Oct 2025US 12,442,460 B2Akrapovic d.d.
- Exhaust silencing device and system, vehicle, and exhaust silencing method2 Sep 2025US 12,404,790 B2Zhejiang Geely Holding Group Co., Ltd.
- Convertible silencer25 Dec 2025US 2025/0389215 A1Discovery Energy, LLC
- Exhaust handling systems for marine vessels and related methods27 Nov 2025US 2025/0360999 A1Marathon Petroleum Company LP
- Dual Mode Muffler27 Feb 2025US 2025/0067201 A1Tenneco Automotive Operating Company Inc.
- Convertible silencer6 Feb 2025US 2025/0043706 A1Discovery Energy, LLC
- Muffler for internal combustion engines21 Nov 2024US 2024/0384673 A1PIAGGIO & C. S. p. A.
Most cited
By later US patents
- Engine exhaust noise suppressor42US 5,984,045 ANissan Motor Co., Ltd. · 1999
- Device for modulating the flow of the gases in an internal combustion engine exhaust muffler34US 4,484,659 ACycles Peugeot · 1984
- Apparatus for controlling exhaust system of internal-combustion engine26US 4,558,566 AHonda Giken Kogyo Kabushiki Kaisha · 1985
- Exhaust handling systems for marine vessels and related methods19US 12,043,361 B1Marathon Petroleum Company LP · 2024
- Automobile exhaust noise silencer19US 5,708,237 ANissan Motor Co., Ltd. · 1998