F24D 15/04
Domestic- or space-heating systems: other domestic- or space-heating systems: using heat pumps
Official title: using heat pumps
F24D15/04 (Domestic- or space-heating systems: other domestic- or space-heating systems: using heat pumps) appears on 97 US grants and 113 published applications in this corpus.
Search patents in F24D- Granted patents
- 97
- Published applications
- 113
- Assignees
- 67
- Inventors
- 243
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 0 | 3 |
| 2012 | 1 | 6 |
| 2013 | 0 | 7 |
| 2014 | 2 | 8 |
| 2015 | 4 | 12 |
| 2016 | 4 | 13 |
| 2017 | 7 | 7 |
| 2018 | 13 | 11 |
| 2019 | 7 | 3 |
| 2020 | 2 | 5 |
| 2021 | 8 | 4 |
| 2022 | 4 | 7 |
| 2023 | 8 | 3 |
| 2024 | 4 | 4 |
| 2025 | 5 | 9 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air conditioning system using heat pump and air heating device24 Feb 2026US 12,560,338 B2Kyungdong Navien Co., Ltd.
- Heat pump system with electrolytic biocide-generating unit28 Oct 2025US 12,454,470 B2ElectroSea, LLC
- Combined space and water heating systems21 Oct 2025US 12,449,139 B2Rheem Manufacturing Company
- Receiver, connection method thereof, receiver assembly and heat pump system16 Sep 2025US 12,416,435 B2Carrier Corporation
- Combined air conditioning and water heating via expansion valve regulation25 Feb 2025US 12,235,026 B2Rheem Manufacturing Company
- Air conditioning system using heat pump and air heating device4 Jun 2026US 2026/0153244 A1Kyungdong Navien Co., Ltd.
- Heat pump, operation method of heat pump, and server4 Jun 2026US 2026/0153268 A1LG Electronics Inc.
- Surface geothermal heat energy capture and storage system12 Mar 2026US 2026/0071762 A1
- Heat pump, systems, and methods for operating the same6 Nov 2025US 2025/0341351 A1Dalrada Financial Corporation
- Air-conditioning apparatus for indoor environments25 Sep 2025US 2025/0297750 A1Mcz Group S.P.A.
Most cited
By later US patents
- Multi-function self-contained heat pump system with microprocessor control67US 5,465,588 AHydro Delta Corporation · 1995
- Auxiliary power unit51US 6,536,207 B1New Power Concepts LLC · 2003
- Heat exchange interface apparatus50US 4,233,818 A1980
- Heat pump type heating apparatus and control method thereof50US 5,170,936 AKabushiki Kaisha Toshiba · 1992
- Integrated ventilation unit45US 8,943,848 B2Reznor LLC · 2015