F01N 2470/02
Tubes being perforated
F01N2470/02 (Tubes being perforated) appears on 541 US grants and 495 published applications in this corpus.
Search patents in F01N- Granted patents
- 541
- Published applications
- 495
- Assignees
- 238
- Inventors
- 1,188
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 8 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 11 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 13 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 3 |
| 2002 | 13 | 9 |
| 2003 | 8 | 10 |
| 2004 | 9 | 9 |
| 2005 | 9 | 8 |
| 2006 | 3 | 14 |
| 2007 | 3 | 17 |
| 2008 | 7 | 12 |
| 2009 | 11 | 21 |
| 2010 | 11 | 19 |
| 2011 | 20 | 14 |
| 2012 | 18 | 22 |
| 2013 | 15 | 20 |
| 2014 | 24 | 29 |
| 2015 | 23 | 38 |
| 2016 | 30 | 24 |
| 2017 | 29 | 21 |
| 2018 | 13 | 15 |
| 2019 | 23 | 43 |
| 2020 | 19 | 37 |
| 2021 | 27 | 38 |
| 2022 | 46 | 14 |
| 2023 | 33 | 20 |
| 2024 | 9 | 16 |
| 2025 | 15 | 10 |
| 2026 | 1 | 12 |
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.
- Tunable exhaust system16 Dec 2025US 12,497,913 B2Advanced Flow Engineering, Inc.
- Sound absorbing element with low profile micro-louver slits and muffler assembly using the same9 Dec 2025US 12,492,654 B2ACS Industries, Inc.
- Dosing and mixing assemblies for exhaust aftertreatment system18 Nov 2025US 12,473,851 B2Donaldson Company, Inc.
- Muffler, exhaust system including a muffler, and method of making a muffler for an exhaust system11 Nov 2025US 12,467,392 B2Purem GmbH
- Two Stage Box Mixer20 Aug 2026US 2026/0241349 A1Tenneco Automotive Operating Company Inc.
- Exhaust gas aftertreatment13 Aug 2026US 2026/0233162 A1Proventia Oy
- L-shaped mixing and evaporation device30 Jul 2026US 2026/0218641 A1Dinex A/S
- Exhaust gas mixer with annular orifice23 Jul 2026US 2026/0208130 A1Tenneco Automotive Operating Company Inc.
- Nozzle designs for secondary air injection in exhaust aftertreatment systems with electrical heaters9 Jul 2026US 2026/0194000 A1Corning Incorporated
Most cited
By later US patents
- Method and apparatus for reducing nitrogen oxides from internal combustion engine207US 5,272,871 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1993
- Vehicle exhaust system118US 7,766,123 B2Yamaha Hatsudoki Kabushiki Kaisha · 2010
- Muffler apparatus with filter trap and method of use96US 4,851,015 ADonaldson Company, Inc. · 1989
- Exhaust muffler76US 7,219,764 B1Heartthrob Exhaust Inc. · 2007
- Method of forming a double wall, air gap exhaust duct component66US 5,170,557 ABenteler Industries, Inc. · 1992