F01N 2470/30
Tubes with restrictions, i.e. venturi or the like
Official title: Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
F01N2470/30 (Tubes with restrictions, i.e. venturi or the like) appears on 193 US grants and 185 published applications in this corpus.
Search patents in F01N- Granted patents
- 193
- Published applications
- 185
- Assignees
- 118
- Inventors
- 497
- Latest grant
- 28 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 5 |
| 2004 | 2 | 5 |
| 2005 | 4 | 6 |
| 2006 | 3 | 1 |
| 2007 | 2 | 8 |
| 2008 | 3 | 7 |
| 2009 | 3 | 16 |
| 2010 | 4 | 16 |
| 2011 | 9 | 12 |
| 2012 | 14 | 11 |
| 2013 | 7 | 9 |
| 2014 | 13 | 9 |
| 2015 | 9 | 5 |
| 2016 | 9 | 9 |
| 2017 | 4 | 15 |
| 2018 | 9 | 10 |
| 2019 | 11 | 5 |
| 2020 | 12 | 8 |
| 2021 | 9 | 11 |
| 2022 | 5 | 4 |
| 2023 | 8 | 4 |
| 2024 | 5 | 5 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Exhaust gas assembly28 Oct 2025US 12,454,902 B2The University of Adelaide
- Catalytic converter7 Oct 2025US 12,435,658 B2Toyota Jidosha Kabushiki Kaisha
- Exhaust discharge system22 Oct 2024US 12,123,332 B2Caterpillar Inc.
- Exhaust gas assembly15 Oct 2024US 12,116,913 B2The University of Adelaide
- Exhaust gas cooling device17 Sep 2024US 12,092,009 B2Tenneco Inc.
- Dual Venturi Exhaust Assembly20 Aug 2026US 2026/0243189 A1
- Exhaust gas assembly2 Jan 2025US 2025/0003359 A1The University of Adelaide
- Swirl structure-based exhaust aftertreatment device for underground mining diesel vehicle3 Oct 2024US 2024/0328340 A1Shandong University of Science and Technology
- Catalytic converter11 Jul 2024US 2024/0229701 A9Toyota Jidosha Kabushiki Kaisha
- Muffler for an exhaust system30 May 2024US 2024/0175381 A1Hug Engineering AG
Most cited
By later US patents
- Straight through muffler with conically-ended output passage126US 6,158,546 ATenneco Automotive Inc. · 2000
- Flattened venturi, method and apparatus for making58US 4,690,245 AStemco Co., Ltd. · 1987
- Muffler with catalytic converter arrangement; and method53US 5,355,973 ADonaldson Company, Inc. · 1994
- Exhaust silencer arrangement52US 6,158,214 AJ. Eberspächer GmbH & Co. KG · 2000
- Multi-pass catalytic converter41US 5,732,555 ABriggs & Stratton Corporation · 1998