F02G 2244/02
Single-acting two piston engines
F02G2244/02 (Single-acting two piston engines) appears on 83 US grants and 57 published applications in this corpus.
Search patents in F02G- Granted patents
- 83
- Published applications
- 57
- Assignees
- 37
- Inventors
- 118
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 2 |
| 2007 | 2 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 2 | 3 |
| 2011 | 1 | 4 |
| 2012 | 0 | 1 |
| 2013 | 2 | 1 |
| 2014 | 4 | 2 |
| 2015 | 1 | 1 |
| 2016 | 0 | 1 |
| 2017 | 2 | 4 |
| 2018 | 1 | 3 |
| 2019 | 2 | 1 |
| 2020 | 3 | 9 |
| 2021 | 8 | 2 |
| 2022 | 5 | 6 |
| 2023 | 4 | 5 |
| 2024 | 6 | 3 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Alpha stirling engine8 Jul 2025US 12,352,223 B2EnergyIntel Services Ltd.
- Compact tandem cylinder reciprocating engine for CO2 power generation28 Jan 2025US 12,209,553 B2Indian Institute of Science
- Engine apparatus and method for operation29 Oct 2024US 12,129,812 B2Hyliion Holdings Corp.
- Stirling cycle machine1 Oct 2024US 12,104,552 B2DEKA Products Limited Partnership
- Stirling cycle machine3 Sep 2024US 12,078,123 B2DEKA Products Limited Partnership
- Dual-Head Opposing-Piston Free-Piston Stirling Engine Design12 Mar 2026US 2026/0071588 A1Exowatt, Inc.
- Stirling cycle machine27 Feb 2025US 2025/0067230 A1DEKA Products Limited Partnership
- Stirling cycle machine23 Jan 2025US 2025/0027461 A1DEKA Products Limited Partnership
- Energy harvesting heat engine19 Dec 2024US 2024/0418136 A1Synergy Power LLC
- Compact tandem cylinder reciprocating engine for co2 power generation26 Sep 2024US 2024/0318554 A1Indian Institute of Science
Most cited
By later US patents
- Method and apparatus for converting thermal energy to mechanical energy39US 7,284,372 B22007
- Power control device35US 3,999,388 AForenade Fabriksverken · 1976
- Mechanical arrangements for Stirling-cycle, reciprocating thermal machines33US 4,413,474 A1983
- Thermodynamic working fluids for Stirling-cycle, reciprocating thermal machines27US 4,413,475 A1983
- Magnetoelectric resonance engine26US 5,146,750 A1992