F02B 41/06
In compound cylinders
Official title: in compound cylinders
F02B41/06 (In compound cylinders) appears on 227 US grants and 178 published applications in this corpus.
Search patents in F02B- Granted patents
- 227
- Published applications
- 178
- Assignees
- 51
- Inventors
- 206
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 0 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 4 |
| 2003 | 7 | 5 |
| 2004 | 1 | 5 |
| 2005 | 3 | 3 |
| 2006 | 7 | 4 |
| 2007 | 4 | 19 |
| 2008 | 10 | 5 |
| 2009 | 6 | 22 |
| 2010 | 9 | 8 |
| 2011 | 11 | 19 |
| 2012 | 6 | 8 |
| 2013 | 7 | 6 |
| 2014 | 9 | 7 |
| 2015 | 5 | 6 |
| 2016 | 7 | 10 |
| 2017 | 9 | 4 |
| 2018 | 8 | 7 |
| 2019 | 5 | 7 |
| 2020 | 7 | 6 |
| 2021 | 5 | 7 |
| 2022 | 9 | 12 |
| 2023 | 11 | 1 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Free piston generator based on rigid synchronous transmission system28 Nov 2023US 11,831,225 B2Harbin Engineering University
- Combustion engine5 Sep 2023US 11,746,690 B2Airdaptive LLC
- Opposed-piston internal combustion engine2 Oct 2025US 2025/0305446 A1Umu Devising LLC
- Dual piston based gensets for vehicle electrification20 Mar 2025US 2025/0092819 A1ePower Mobility LLC
- Multifuel closed-loop thermal cycle piston engine, system and method9 May 2024US 2024/0151193 A1Engine Development Corp, LLC
- Split-cycle internal combustion engine5 Jan 2023US 2023/0003165 A1Fpt Industrial S.P.A.
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Most cited
By later US patents
- Split-cycle air hybrid engine74US 7,353,786 B2Scuderi Group, LLC · 2008
- Turbocharged compund cycle ducted fan engine system66US 4,815,282 ATeledyne Industries, Inc. · 1989
- Split-cycle air hybrid engine56US 7,603,970 B2Scuderi Group, LLC · 2009
- Split four stroke engine55US 6,722,127 B22004
- Quasi-isothermal brayton cycle engine55US 6,886,326 B2The Texas A&M University System · 2005