F24F 1/44
Characterised by the use of internal combustion engines
Official title: characterised by the use of internal combustion engines
F24F1/44 (Characterised by the use of internal combustion engines) appears on 15 US grants and 15 published applications in this corpus.
Search patents in F24F- Granted patents
- 15
- Published applications
- 15
- Assignees
- 10
- Inventors
- 51
- Latest grant
- 16 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 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 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 2 | 0 |
| 2020 | 2 | 2 |
| 2021 | 0 | 1 |
| 2022 | 3 | 2 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Gas engine heat pump16 May 2023US 11,649,752 B2LG Electronics Inc.
- Gas engine heat pump1 Nov 2022US 11,486,331 B2LG Electronics Inc.
- Gas heat pump system21 Jun 2022US 11,365,911 B2LG Electronics Inc.
- Outdoor unit of gas heat pump system25 Jan 2022US 11,231,184 B2LG Electronics Inc.
- Engine drive apparatus15 Dec 2020US 10,865,741 B2LG Electronics Inc.
- Rooftop hvac unit5 Dec 2024US 2024/0401843 A1Carrier Corporation
- Gas engine air-conditioning device14 Dec 2023US 2023/0400235 A1Rise Pit Company Co., Ltd.
- Heat Pump Device26 Oct 2023US 2023/0339292 A1Yanmar Holdings Co., Ltd.
- Gas engine heat pump24 Feb 2022US 2022/0056829 A1LG Electronics Inc.
- Gas engine heat pump24 Feb 2022US 2022/0056837 A1LG Electronics Inc.
Most cited
By later US patents
- Cogeneration system24US 7,466,034 B2LG Electronics Inc. · 2008
- Engine driven heat pump system23US 5,020,320 AGas Research Institute · 1991
- Outdoor heat exchanger unit, outdoor unit, and gas heat pump type air conditioner14US 6,769,481 B2Mitsubishi Heavy Industries, Ltd. · 2004
- Outdoor unit for a heat pump13US 4,805,689 AAisin Seiki Kabushiki Kaisha · 1989
- Engine drive air conditioner4US 5,319,944 AGas Research Institute · 1994