F01N 13/1833
Specially adapted for small internal combustion engines
Official title: {specially adapted for small internal combustion engines, e.g. used in model applications}
F01N13/1833 (Specially adapted for small internal combustion engines) appears on 24 US grants and 20 published applications in this corpus.
Search patents in F01N- Granted patents
- 24
- Published applications
- 20
- Assignees
- 17
- Inventors
- 58
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 4 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 3 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Variable exhaust control system11 Nov 2025US 12,467,399 B2
- Muffler for small engines11 Jun 2024US 12,006,855 B2Orbital Australia Pty Ltd
- Encased exhaust28 Mar 2023US 11,613,374 B2
- Muffler14 Jul 2020US 10,711,670 B2Orbital Australia Pty Ltd
- Hedge trimmer15 Oct 2019US 10,440,899 B2Andreas Stihl AG & CO.KG
- Encased Exhaust15 Dec 2022US 2022/0396366 A1
- Improved muffler for small engines4 Aug 2022US 2022/0243638 A1Orbital Australia Pty Ltd
- Variable Exhaust Control System20 Jun 2019US 2019/0186329 A1Cobra Aero LLC
- Engine and engine work machine31 Jan 2019US 2019/0032531 A1Koki Holdings Co., Ltd.
- Muffler24 Jan 2019US 2019/0024548 A1Orbital Australia Pty Ltd
Most cited
By later US patents
- Tuned exhaust system for small engines35US 6,959,782 B2Tecumseh Products Company · 2005
- Method and apparatus for attenuating sound31US 4,418,790 AMcCulloch Corporation · 1983
- Self-contained muffler attachment and conversion kit for small two-cycle engines27US 4,858,722 A1989
- External catalytic converter for small internal combustion engines21US 5,339,629 ABriggs & Stratton Corporation · 1994
- Exhaust muffler for small internal combustion engine15US 5,611,409 A1997