F24D 5/12
Hot-air central heating systems: using heat pumps
Official title: using heat pumps
F24D5/12 (Hot-air central heating systems: using heat pumps) appears on 114 US grants and 138 published applications in this corpus.
Search patents in F24D- Granted patents
- 114
- Published applications
- 138
- Assignees
- 91
- Inventors
- 310
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 8 |
| 2012 | 1 | 8 |
| 2013 | 0 | 13 |
| 2014 | 5 | 7 |
| 2015 | 4 | 14 |
| 2016 | 7 | 8 |
| 2017 | 10 | 7 |
| 2018 | 9 | 6 |
| 2019 | 9 | 9 |
| 2020 | 4 | 8 |
| 2021 | 5 | 13 |
| 2022 | 7 | 3 |
| 2023 | 5 | 8 |
| 2024 | 8 | 9 |
| 2025 | 3 | 7 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integrated heating system using a Stirling heat pump18 Aug 2026US 12,710,202 B2Trane International Inc.
- System and method for controlling HVAC systems5 May 2026US 12,618,579 B2Daikin Manufacturing Company, L.P.
- Thermal energy storage integrated heat pump17 Mar 2026US 12,578,128 B2Rheem Manufacturing Company
- Air conditioning system using heat pump and air heating device24 Feb 2026US 12,560,338 B2Kyungdong Navien Co., Ltd.
- Air conditioning system19 Aug 2025US 12,392,521 B2Mitsubishi Electric Corporation
- Heating system with heat pump for internal installation13 Aug 2026US 2026/0235308 A1Innova, Inc.
- Air conditioning system using heat pump and air heating device4 Jun 2026US 2026/0153244 A1Kyungdong Navien Co., Ltd.
- Hybrid heating system with humidity control4 Jun 2026US 2026/0153253 A1Midea Group Co., Ltd.
- Solar heating systems and methods for providing demand response assistance to electric heat pumps and water heaters19 Mar 2026US 2026/0078912 A1Duke Energy Corporation
- Condensate pan for a heat exchanger28 Aug 2025US 2025/0271172 A1Tyco Fire & Security GmbH
Most cited
By later US patents
- Desiccant assisted air conditioner154US 4,887,438 A1989
- Methods, systems, and related architectures for managing network connected thermostats130US 8,843,239 B2Nest Labs, Inc. · 2014
- Control device for heat pump with hot-water supply facility66US 4,943,003 ASanden Corporation · 1990
- Monitoring and recoverable protection of thermostat switching circuitry62US 8,659,302 B1Nest Labs, Inc. · 2014
- Heat pump refrigeration circuit with liquid heating capability51US 4,528,822 AAmerican Standard Inc. · 1985