F02B 41/04
In main cylinders
Official title: in main cylinders
F02B41/04 (In main cylinders) appears on 197 US grants and 126 published applications in this corpus.
Search patents in F02B- Granted patents
- 197
- Published applications
- 126
- Assignees
- 60
- Inventors
- 243
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 9 | 0 |
| 1993 | 10 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 1 | 4 |
| 2003 | 9 | 6 |
| 2004 | 5 | 9 |
| 2005 | 5 | 7 |
| 2006 | 4 | 3 |
| 2007 | 5 | 8 |
| 2008 | 4 | 2 |
| 2009 | 3 | 5 |
| 2010 | 1 | 3 |
| 2011 | 1 | 5 |
| 2012 | 6 | 9 |
| 2013 | 0 | 13 |
| 2014 | 14 | 10 |
| 2015 | 5 | 3 |
| 2016 | 6 | 6 |
| 2017 | 3 | 7 |
| 2018 | 7 | 7 |
| 2019 | 8 | 4 |
| 2020 | 2 | 5 |
| 2021 | 6 | 0 |
| 2022 | 3 | 4 |
| 2023 | 2 | 1 |
| 2024 | 2 | 2 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual piston based gensets for vehicle electrification16 Jun 2026US 12,655,787 B2ePower Mobility LLC
- Crank gear spring engine26 Aug 2025US 12,398,669 B1
- Method for a combustion machine with two times three strokes22 Oct 2024US 12,123,342 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Piston—crankshaft connecting means for internal combustion engine30 Jul 2024US 12,049,960 B2
- Throttle-at-valve apparatus7 Mar 2023US 11,598,256 B2
- Valved-piston and actuator with recycled combustion4 Dec 2025US 2025/0369373 A1
- Dual piston based gensets for vehicle electrification20 Mar 2025US 2025/0092819 A1ePower Mobility LLC
- Dual-connection crank-piston mechanism3 Oct 2024US 2024/0328347 A1Sichuan Beixin Hongneng Technology Research Institute
- Method for a combustion machine with two times three strokes12 Sep 2024US 2024/0301817 A1Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Piston - crankshaft connecting means for internal combustion engine19 Jan 2023US 2023/0020739 A1
Most cited
By later US patents
- Variable-cycle reciprocating internal combustion engine64US 4,856,463 A1989
- Split four stroke cycle internal combustion engine63US 6,543,225 B2Scuderi Group, LLC · 2003
- Engine system employing an unsymmetrical cycle56US 6,170,441 B2Quantum Energy Technologies · 2001
- Split four stroke engine50US 6,609,371 B2Scuderi Group, LLC · 2003
- Internal combustion engine and operating cycle therefor47US 4,635,590 A1987