F02G 1/055
Heaters or coolers
F02G1/055 (Heaters or coolers) appears on 301 US grants and 235 published applications in this corpus.
Search patents in F02G- Granted patents
- 301
- Published applications
- 235
- Assignees
- 148
- Inventors
- 485
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 13 | 2 |
| 2002 | 7 | 4 |
| 2003 | 5 | 5 |
| 2004 | 3 | 9 |
| 2005 | 10 | 10 |
| 2006 | 5 | 6 |
| 2007 | 5 | 7 |
| 2008 | 2 | 3 |
| 2009 | 3 | 6 |
| 2010 | 5 | 7 |
| 2011 | 3 | 9 |
| 2012 | 3 | 10 |
| 2013 | 6 | 10 |
| 2014 | 6 | 8 |
| 2015 | 8 | 14 |
| 2016 | 14 | 14 |
| 2017 | 9 | 10 |
| 2018 | 15 | 11 |
| 2019 | 7 | 7 |
| 2020 | 14 | 18 |
| 2021 | 17 | 14 |
| 2022 | 15 | 15 |
| 2023 | 13 | 13 |
| 2024 | 13 | 7 |
| 2025 | 2 | 10 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Energy harvesting heat engine28 Jul 2026US 12,692,821 B2Synergy Power LLC
- Internally heated engine28 Jul 2026US 12,692,822 B2Heneng (Hainan) Technology Co., Ltd
- Maximum delivery adiabatic hot-air engine9 Jun 2026US 12,650,097 B1
- Hot air engine19 May 2026US 12,631,154 B2Ceramic Stirling IP Holding LLP
- Mobile oil stream energy recovery system10 Mar 2026US 12,571,332 B2Gradient Geothermal Inc.
- Mobile oil stream energy recovery system27 Aug 2026US 2026/0251079 A1Gradient Geothermal Inc.
- Method of manufacturing heat accumulator, and heat accumulator16 Jul 2026US 2026/0202140 A1Central Motor Wheel Co., Ltd.
- Hot-gas free-piston stirling engine with efficient hot air inlet2 Apr 2026US 2026/0092576 A1Exowatt, Inc.
- Near-Adiabatic External Heat Valve Engine2 Apr 2026US 2026/0092577 A1
- Dual-Head Opposing-Piston Free-Piston Stirling Engine Design12 Mar 2026US 2026/0071588 A1Exowatt, Inc.
Most cited
By later US patents
- Drive unit for prosthetic limb73US 6,645,252 B2Honda Giken Kogyo Kabushiki Kaisha · 2003
- Stirling engine having platelet heat exchanging elements59US 6,513,326 B12003
- Atmospheric storage and transfer of thermal energy58US 10,082,104 B2X Development LLC · 2018
- Congeneration system with a Stirling engine58US 5,074,114 AStirling Thermal Motors, Inc. · 1991
- Isothermalizer system54US 4,446,698 ANew Process Industries, Inc. · 1984