F02B 31/085
Having two inlet valves
Official title: {having two inlet valves}
F02B31/085 (Having two inlet valves) appears on 445 US grants and 235 published applications in this corpus.
Search patents in F02B- Granted patents
- 445
- Published applications
- 235
- Assignees
- 112
- Inventors
- 895
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 11 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 9 | 0 |
| 1990 | 7 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 13 | 0 |
| 1997 | 20 | 0 |
| 1998 | 22 | 0 |
| 1999 | 23 | 0 |
| 2000 | 20 | 0 |
| 2001 | 25 | 13 |
| 2002 | 16 | 19 |
| 2003 | 25 | 20 |
| 2004 | 24 | 19 |
| 2005 | 11 | 19 |
| 2006 | 24 | 14 |
| 2007 | 16 | 14 |
| 2008 | 11 | 8 |
| 2009 | 5 | 6 |
| 2010 | 8 | 17 |
| 2011 | 8 | 1 |
| 2012 | 4 | 8 |
| 2013 | 8 | 3 |
| 2014 | 3 | 4 |
| 2015 | 4 | 6 |
| 2016 | 1 | 10 |
| 2017 | 5 | 5 |
| 2018 | 9 | 9 |
| 2019 | 7 | 17 |
| 2020 | 11 | 5 |
| 2021 | 13 | 11 |
| 2022 | 5 | 3 |
| 2023 | 3 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Stratified nitrogen enriched air (nea) strategies and methods to reduce nox emissions from engines31 Jul 2025US 2025/0243799 A1Saudi Arabian Oil Company
- Parallel Intake Valve Tumble Flow Engine9 Mar 2023US 2023/0077310 A1Southwest Research Institute
- Gas intake device having two asymmetrical intake ducts2 Jun 2022US 2022/0170412 A1Ifp Energies Nouvelles
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By later US patents
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- Exhaust gas purification device for an internal combustion engine105US 5,732,554 AToyota Jidosha Kabushiki Kaisha · 1998
- Method for controlling injection timing of an internal combustion engine103US 7,278,396 B2Ford Global Technologies, LLC · 2007