F02B 25/26
Multi-cylinder engines other than those provided for in, or of interest apart
Official title: Multi-cylinder engines other than those provided for in, or of interest apart from, groups F02B25/02 - F02B25/24 (internal-combustion aspects of rotary engines F02B57/00)
F02B25/26 (Multi-cylinder engines other than those provided for in, or of interest apart) appears on 65 US grants and 20 published applications in this corpus.
Search patents in F02B- Granted patents
- 65
- Published applications
- 20
- Assignees
- 33
- Inventors
- 89
- Latest grant
- 6 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 3 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 2 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 3 |
| 2018 | 4 | 0 |
| 2019 | 0 | 3 |
| 2020 | 0 | 2 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Two stroke charge piston engine6 May 2025US 12,291,993 B1
- Cylinder gas recirculation system device of internal combustion engine based on pressure differential driving22 Oct 2024US 12,123,378 B1Tianjin University
- Port belt arrangement31 Aug 2021US 11,105,293 B2Cox Powertrain Limited
- Method for operating an internal combustion engine, and internal combustion engine27 Jul 2021US 11,073,079 B2MTU Friedrichshafen GmbH
- Internal combustion engine23 Feb 2021US 10,927,751 B2Bayerische Motoren Werke Aktiengesellschaft
- Method for operating an internal combustion engine, and internal combustion engine21 May 2020US 2020/0158013 A1MTU Friedrichshafen GmbH
- Internal Combustion Engine16 Apr 2020US 2020/0116075 A1Bayerische Motoren Werke Aktiengesellschaft
- Port belt arrangement13 Jun 2019US 2019/0178199 A1Cox Powertrain Limited
- Two-stroke engine with improved performance6 Jun 2019US 2019/0170055 A1Tti (Macao Commercial Offshore) Limited
- Internal combustion engine4 Apr 2019US 2019/0100295 A1Joost Engines Ltd
Most cited
By later US patents
- Dual fuel engine60US 4,527,516 APro-Staff Overload Enterprises Limited · 1985
- Internal combustion engine50US 7,469,664 B2Advanced Propulsion Technologies, Inc. · 2008
- Air charging system for an opposed piston opposed cylinder free piston engine39US 6,957,632 B1Ford Global Technologies, LLC · 2005
- Exhaust port control valve for two stroke engine38US 5,000,131 AYamaha Hatsudoki Kabushiki Kaisha · 1991
- Internal combustion engine having a variable engine displacement25US 4,066,049 AInstitutul National Pentru Creatie Stintifica si Tehnica - Increst · 1978