F01N 2490/04
The gases flowing longitudinally from inlet to outlet only in one direction
Official title: the gases flowing longitudinally from inlet to outlet only in one direction
F01N2490/04 (The gases flowing longitudinally from inlet to outlet only in one direction) appears on 69 US grants and 54 published applications in this corpus.
Search patents in F01N- Granted patents
- 69
- Published applications
- 54
- Assignees
- 43
- Inventors
- 121
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 2 | 3 |
| 2005 | 2 | 5 |
| 2006 | 2 | 1 |
| 2007 | 2 | 3 |
| 2008 | 1 | 5 |
| 2009 | 0 | 3 |
| 2010 | 6 | 0 |
| 2011 | 3 | 2 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 4 | 2 |
| 2015 | 0 | 3 |
| 2016 | 3 | 4 |
| 2017 | 3 | 4 |
| 2018 | 5 | 0 |
| 2019 | 2 | 5 |
| 2020 | 1 | 6 |
| 2021 | 4 | 2 |
| 2022 | 6 | 2 |
| 2023 | 3 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Noise cancelling device21 Jul 2026US 12,688,841 B1King Fahd University of Petroleum and Minerals
- Exhaust apparatus12 Sep 2023US 11,753,973 B2Suzuki Motor Corporation
- Muffler for vehicle30 May 2023US 11,661,871 B2Hyundai Motor Company
- Exhaust muffler for an exhaust system of an internal combustion engine9 May 2023US 11,643,953 B2Purem GmbH
- Exhaust device15 Nov 2022US 11,499,464 B2Suzuki Motor Corporation
- Exhaust muffler2 Apr 2026US 2026/0092545 A1Tenneco Automotive Operating Company Inc.
- Exhaust apparatus24 Nov 2022US 2022/0372900 A1Suzuki Motor Corporation
- Exhaust device10 Feb 2022US 2022/0042441 A1Suzuki Motor Corporation
- Muffler With Internally Supported Tuner8 Jul 2021US 2021/0207507 A1Tenneco Automotive Operating Company Inc.
- Muffler for vehicle13 May 2021US 2021/0140354 A1Hyundai Motor Company
Most cited
By later US patents
- Exhaust muffler174US 4,880,078 AHonda Giken Kogyo Kabushiki Kaisha · 1989
- Noise silencer97US 4,109,751 ADeere & Company · 1978
- Catalytic converter82US 6,722,124 B2Nelson Burgess Limited · 2004
- Flattened venturi, method and apparatus for making58US 4,690,245 AStemco Co., Ltd. · 1987
- Engine exhaust noise suppressor42US 5,984,045 ANissan Motor Co., Ltd. · 1999