F02B 75/40
Internal-combustion piston engines: other engines: other reciprocating-piston engines
Official title: Other reciprocating-piston engines
F02B75/40 (Internal-combustion piston engines: other engines: other reciprocating-piston engines) appears on 45 US grants and 41 published applications in this corpus.
Search patents in F02B- Granted patents
- 45
- Published applications
- 41
- Assignees
- 11
- Inventors
- 47
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 1 | 16 |
| 2008 | 9 | 0 |
| 2009 | 4 | 0 |
| 2010 | 5 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 3 |
| 2017 | 2 | 3 |
| 2018 | 2 | 0 |
| 2019 | 2 | 5 |
| 2020 | 4 | 3 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 3 | 1 |
| 2024 | 1 | 0 |
| 2025 | 3 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Alternative heat source for an engine19 Aug 2025US 12,392,279 B1
- Mechanical leverage to generate torque force to a rotary shaft20 May 2025US 12,305,568 B2
- Power unit1 Apr 2025US 12,264,618 B2Obrist Technologies GmbH
- Free-piston linear generator24 Dec 2024US 12,173,642 B1
- Oil scraper ring for a piston rod7 Nov 2023US 11,808,360 B2Hoerbiger Wien GmbH
- Mechanical leverage to generate torque force to a rotary shaft23 Jan 2025US 2025/0027441 A1
- Rotary engine18 May 2023US 2023/0151762 A1Jiangsu University
- Power Unit9 Sep 2021US 2021/0277823 A1Obrist Technologies GmbH
- Engine16 Jul 2020US 2020/0224586 A1Ingenuity Engines, LLC
- Oil scraper ring for a piston rod26 Mar 2020US 2020/0096104 A1Hoerbiger Wien GmbH
Most cited
By later US patents
- Internal combustion engine that completes four cycles in one revolution of the crankshaft28US 6,474,288 B12002
- Dual head piston engine21US 7,412,949 B12008
- Rotary valve system and engine using the same18US 7,325,520 B2Zajac Optimum Output Motors, Inc. · 2008
- Rotary valve system and engine using the same18US 7,328,674 B2Zajac Optimum Output Motors, Inc. · 2008
- Split engine clutch13US 4,555,003 A1985