F24F 3/0442
With volume control at a constant temperature
Official title: {with volume control at a constant temperature}
F24F3/0442 (With volume control at a constant temperature) appears on 194 US grants and 176 published applications in this corpus.
Search patents in F24F- Granted patents
- 194
- Published applications
- 176
- Assignees
- 102
- Inventors
- 331
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 2 | 13 |
| 2004 | 10 | 9 |
| 2005 | 3 | 12 |
| 2006 | 10 | 6 |
| 2007 | 3 | 12 |
| 2008 | 5 | 5 |
| 2009 | 6 | 4 |
| 2010 | 3 | 6 |
| 2011 | 1 | 11 |
| 2012 | 9 | 13 |
| 2013 | 4 | 6 |
| 2014 | 6 | 7 |
| 2015 | 9 | 10 |
| 2016 | 6 | 7 |
| 2017 | 9 | 5 |
| 2018 | 6 | 10 |
| 2019 | 9 | 9 |
| 2020 | 7 | 7 |
| 2021 | 5 | 6 |
| 2022 | 5 | 8 |
| 2023 | 5 | 5 |
| 2024 | 5 | 2 |
| 2025 | 6 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and systems for controlling an HVAC system to identify energy usage under different control strategies18 Aug 2026US 12,710,186 B2Honeywell International Inc.
- Air conditioning system7 Apr 2026US 12,595,925 B2Daikin Industries, Ltd.
- Housing of an HVAC system16 Sep 2025US 12,416,427 B2Tyco Fire & Security GmbH
- Single zone variable air volume control systems and methods26 Aug 2025US 12,399,517 B2Johnson Controls Light Commercial IP GmbH
- Multi-zone variable refrigerant flow heating/cooling unit22 Jul 2025US 12,366,370 B2MJC, Inc.
- Housing of an hvac system8 Jan 2026US 2026/0009558 A1Tyco Fire & Security GmbH
- Multi-zone variable refrigerant flow heating/cooling unit6 Nov 2025US 2025/0341320 A1MJC, Inc.
- Methods and systems for controlling an hvac system to identify energy usage under different control strategies27 Feb 2025US 2025/0067452 A1Honeywell International Inc.
- Air-conditioning system2 May 2024US 2024/0142119 A1Fh Alliance Inc.
- Air handling system with integrated air treatment22 Feb 2024US 2024/0060662 A1Enverid Systems, Inc.
Most cited
By later US patents
- Forced-air zone climate control system for existing residential houses268US 6,983,889 B2Home Comfort Zones, Inc. · 2006
- Retrofit HVAC zone climate control system219US 6,997,390 B2Home Comfort Zones, Inc. · 2006
- Air flow management system for an internet data center215US 6,672,955 B2International Business Machines Corporation · 2004
- Zone climate control177US 7,188,779 B2Home Comfort Zones, Inc. · 2007
- Energy usage estimation for climate control system143US 7,392,661 B2Home Comfort Zones, Inc. · 2008