F24F 2221/54
Heating and cooling, simultaneously or alternatively
F24F2221/54 (Heating and cooling, simultaneously or alternatively) appears on 337 US grants and 348 published applications in this corpus.
Search patents in F24F- Granted patents
- 337
- Published applications
- 348
- Assignees
- 169
- Inventors
- 917
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 10 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 0 |
| 2002 | 6 | 2 |
| 2003 | 3 | 1 |
| 2004 | 2 | 3 |
| 2005 | 2 | 6 |
| 2006 | 1 | 5 |
| 2007 | 2 | 1 |
| 2008 | 0 | 7 |
| 2009 | 2 | 7 |
| 2010 | 2 | 5 |
| 2011 | 1 | 12 |
| 2012 | 4 | 13 |
| 2013 | 3 | 5 |
| 2014 | 0 | 6 |
| 2015 | 7 | 12 |
| 2016 | 9 | 6 |
| 2017 | 8 | 14 |
| 2018 | 11 | 25 |
| 2019 | 13 | 29 |
| 2020 | 29 | 34 |
| 2021 | 24 | 35 |
| 2022 | 20 | 23 |
| 2023 | 24 | 25 |
| 2024 | 33 | 32 |
| 2025 | 20 | 23 |
| 2026 | 13 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Indoor unit of air conditioner29 Sep 2026US 12,747,871 B2Fujitsu General Limited
- Portable air conditioner15 Sep 2026US 12,736,233 B2Hephzibah Co., Ltd.
- Cold and hot dual-functional atomization structure of humidifier15 Sep 2026US 12,736,237 B2Shenzhen Xianma Technology Co., Ltd
- Cold climate heat pump system with energy storage11 Aug 2026US 12,704,328 B2Trane International Inc.
- Ceiling-mounted radiating elements28 Jul 2026US 12,693,034 B2Kermi GmbH
- System and method for heating and cooling24 Sep 2026US 2026/0287196 A1Daikin Industries, Ltd.
- Method and apparatus for intelligent temperature control24 Sep 2026US 2026/0287200 A1Universal Electronics Inc.
- System and Method for Controlling Ventilation Air of a Target Space9 Jul 2026US 2026/0194250 A1Lennox Industries Inc.
- Cold and hot dual-functional atomization structure of humidifier25 Jun 2026US 2026/0177256 A1Shenzhen Xianma Technology Co., Ltd
- Air handling unit with a heating module11 Jun 2026US 2026/0160431 A1Carrier Corporation
Most cited
By later US patents
- Wireless communication system for air distribution system257US 5,390,206 AAmerican Standard Inc. · 1995
- Self configuring controller243US 5,276,630 AAmerican Standard Inc. · 1994
- Wireless air balancing system140US 5,341,988 AAmerican Standard Inc. · 1994
- Interior atmosphere control system131US 5,259,553 ANorm Pacific Automation Corp. · 1993
- Energy conservative control of heating, ventilating, and air conditioning (HVAC) systems119US 4,205,381 AUnited Technologies Corporation · 1980