F02B 75/225
Having two or more crankshafts
Official title: {having two or more crankshafts}
F02B75/225 (Having two or more crankshafts) appears on 51 US grants and 32 published applications in this corpus.
Search patents in F02B- Granted patents
- 51
- Published applications
- 32
- Assignees
- 20
- Inventors
- 78
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 3 | 3 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 2 | 4 |
| 2015 | 3 | 3 |
| 2016 | 0 | 2 |
| 2017 | 2 | 3 |
| 2018 | 4 | 3 |
| 2019 | 3 | 4 |
| 2020 | 4 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method of operating an internal combustion engine of a truck or omnibus28 Apr 2026US 12,612,878 B2Obrist Technologies GmbH
- High-speed long-stroke reciprocating engine23 Sep 2025US 12,421,891 B1Saudi Arabian Oil Company
- Power unit1 Apr 2025US 12,264,618 B2Obrist Technologies GmbH
- Piston internal combustion engine with generator10 Aug 2021US 11,085,370 B2
- Method of operating an internal combustion engine of a truck or omnibus4 Jan 2024US 2024/0003305 A1Obrist Technologies GmbH
- Power Unit9 Sep 2021US 2021/0277823 A1Obrist Technologies GmbH
- Piston Internal Combustion Engine With Generator20 Aug 2020US 2020/0263602 A1
- Internal combustion engine with paired, parallel, offset pistons10 Oct 2019US 2019/0309679 A1Wise Motor Works, Ltd.
- Engine cylinder block16 May 2019US 2019/0145346 A1Xuzhou Xian Bo Engine Machinery Technology Co., Ltd.
Most cited
By later US patents
- Crankshaft phasing mechanism58US 4,876,992 AThe Standard Oil Company · 1989
- Low emission combustion system for internal combustion engines39US 5,042,441 A1991
- Leading piston engine with two cylinders interconnected through a transfer port36US 4,955,328 AThe Standard Oil Company · 1990
- Separate process engine26US 6,199,369 B12001
- Water vehicle having a "V" shaped multi-cylinder crankcase scavenging engine19US 5,778,833 AYamaha Hatsudoki Kabushiki Kaisha · 1998