F24F
Air-conditioning
Official title: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
F24F (Air-conditioning) appears on 29,402 US grants and 31,604 published applications in this corpus.
Search patents in F24F- Granted patents
- 29,402
- Published applications
- 31,604
- Assignees
- 8,466
- Inventors
- 48,028
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 230 | 0 |
| 1977 | 209 | 0 |
| 1978 | 205 | 0 |
| 1979 | 159 | 0 |
| 1980 | 204 | 0 |
| 1981 | 232 | 0 |
| 1982 | 179 | 0 |
| 1983 | 189 | 0 |
| 1984 | 218 | 0 |
| 1985 | 271 | 0 |
| 1986 | 198 | 0 |
| 1987 | 257 | 0 |
| 1988 | 251 | 0 |
| 1989 | 291 | 0 |
| 1990 | 271 | 0 |
| 1991 | 283 | 0 |
| 1992 | 315 | 0 |
| 1993 | 316 | 0 |
| 1994 | 366 | 0 |
| 1995 | 314 | 0 |
| 1996 | 313 | 0 |
| 1997 | 339 | 0 |
| 1998 | 437 | 0 |
| 1999 | 436 | 0 |
| 2000 | 451 | 0 |
| 2001 | 497 | 113 |
| 2002 | 470 | 356 |
| 2003 | 408 | 468 |
| 2004 | 380 | 593 |
| 2005 | 333 | 710 |
| 2006 | 389 | 761 |
| 2007 | 346 | 637 |
| 2008 | 318 | 764 |
| 2009 | 296 | 736 |
| 2010 | 423 | 874 |
| 2011 | 410 | 898 |
| 2012 | 444 | 983 |
| 2013 | 510 | 1016 |
| 2014 | 634 | 1208 |
| 2015 | 778 | 1482 |
| 2016 | 897 | 1439 |
| 2017 | 1196 | 1613 |
| 2018 | 1258 | 1664 |
| 2019 | 1589 | 1938 |
| 2020 | 1712 | 2107 |
| 2021 | 1563 | 2260 |
| 2022 | 1652 | 2184 |
| 2023 | 1744 | 2061 |
| 2024 | 1695 | 2010 |
| 2025 | 1517 | 1593 |
| 2026 | 1009 | 1136 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F24F 11/00Control or safety arrangements12,651
- F24F 13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air9,134
- F24F 2110/00Control inputs relating to air propertiesIndexing code5,439
- F24F 1/00Room units for air-conditioning4,866
- F24F 3/00Air-conditioning systems in which conditioned primary air is supplied from one or4,665
- F24F 8/00Treatment3,066
- F24F 5/00Air-conditioning systems or apparatus not covered by f24f1/00 or f24f3/002,913
- F24F 7/00Ventilation2,902
All 16 main groupsShow fewer
- F24F 2221/00Details or features not otherwise provided forIndexing code2,795
- F24F 2140/00Control inputs relating to system statesIndexing code2,152
- F24F 6/00Air-humidification1,812
- F24F 2120/00Control inputs relating to users or occupantsIndexing code1,720
- F24F 12/00Use of energy recovery systems in air conditioning, ventilation or screening896
- F24F 2130/00Control inputs relating to environmental factors not covered by group f24f2110/00Indexing code771
- F24F 2203/00Devices or apparatus used for air treatmentIndexing code768
- F24F 9/00Use of air currents for screening275
Recent patents
- Portable breathing air filtering device and method6 Oct 2026US 12,752,231 B2King Abdullah University of Science and Technology
- Fine particles space placement control system, fine particles space placement control method, and computer-readable storage medium6 Oct 2026US 12,752,295 B2
- Outdoor unit of air conditioner6 Oct 2026US 12,753,934 B2Samsung Electronics Co., Ltd.
- Air guide ring, air conditioner outdoor unit, and air conditioner6 Oct 2026US 12,753,935 B2Gd Midea Heating & Ventilating Equipment Co., Ltd.
- Combustion heater and air conditioning system6 Oct 2026US 12,753,936 B2Daikin Industries, Ltd.
- Airframe system and method of controlling airflow8 Oct 2026US 2026/0306210 A1SLD Technology, Inc.
- Air Treatment System8 Oct 2026US 2026/0307008 A1Universiteit Antwerpen
- Systems, Methods, and Apparatuses for Producing and Packaging Medical Fluids8 Oct 2026US 2026/0307835 A1
- Method of enhancing performance of a porous evaporative media8 Oct 2026US 2026/0308483 A1Ecolab USA Inc.
- Air conditioner indoor unit and air conditioner8 Oct 2026US 2026/0309341 A1Gd Midea Heating & Ventilating Equipment Co., Ltd.
Most cited
By later US patents
- HVAC actuator with automatic end stop recalibration963US 9,641,122 B2Johnson Controls Technology Company · 2017
- Environmental condition control and energy management system and method768US 6,216,956 B1Tocom, Inc. · 2001
- Energy management and home automation system750US 5,544,036 A1996
- Home cleaning robot729US 6,459,955 B1The Procter & Gamble Company · 2002
- Energy management and home automation system572US 5,761,083 A1998