F25B 2313/0213
The auxiliary heat exchanger being only used during heating
Official title: the auxiliary heat exchanger being only used during heating
F25B2313/0213 (The auxiliary heat exchanger being only used during heating) appears on 20 US grants and 16 published applications in this corpus.
Search patents in F25B- Granted patents
- 20
- Published applications
- 16
- Assignees
- 13
- Inventors
- 57
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 4 |
| 2004 | 1 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 3 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Refrigeration cycle device2 Dec 2021US 2021/0372671 A1Daikin Industries, Ltd.
- Auxiliary heat source, air conditioning system with auxiliary heat source, and method therefor15 Jul 2021US 2021/0215406 A1Mitsubishi Electric US, Inc.
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Most cited
By later US patents
- Geothermal subcircuit for air conditioning unit54US 5,937,665 AGeofurnace Systems, Inc. · 1999
- Vehicle air conditioner with vapor-compression refrigerant cycle26US 6,920,922 B2Denso Corporation · 2005
- Air-conditioning apparatus19US 5,878,810 AKabushiki Kaisha Toshiba · 1999
- Air conditioner with function for temperature control of radiant heat exchanger18US 5,086,626 AKabushiki Kaisha Toshiba · 1992
- Transport refrigeration system13US 4,353,221 AThermo King Corporation · 1982