F24H 3/00
Air heaters
F24H3/00 (Air heaters) appears on 1,830 US grants and 1,805 published applications in this corpus.
Search patents in F24H- Granted patents
- 1,830
- Published applications
- 1,805
- Assignees
- 947
- Inventors
- 3,634
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 18 | 0 |
| 1978 | 29 | 0 |
| 1979 | 24 | 0 |
| 1980 | 35 | 0 |
| 1981 | 27 | 0 |
| 1982 | 33 | 0 |
| 1983 | 22 | 0 |
| 1984 | 24 | 0 |
| 1985 | 35 | 0 |
| 1986 | 29 | 0 |
| 1987 | 32 | 0 |
| 1988 | 29 | 0 |
| 1989 | 25 | 0 |
| 1990 | 27 | 0 |
| 1991 | 36 | 0 |
| 1992 | 20 | 0 |
| 1993 | 25 | 0 |
| 1994 | 40 | 0 |
| 1995 | 26 | 0 |
| 1996 | 23 | 0 |
| 1997 | 20 | 0 |
| 1998 | 23 | 0 |
| 1999 | 26 | 0 |
| 2000 | 27 | 0 |
| 2001 | 24 | 3 |
| 2002 | 20 | 12 |
| 2003 | 17 | 26 |
| 2004 | 18 | 29 |
| 2005 | 28 | 45 |
| 2006 | 23 | 33 |
| 2007 | 11 | 47 |
| 2008 | 17 | 62 |
| 2009 | 19 | 53 |
| 2010 | 23 | 61 |
| 2011 | 28 | 80 |
| 2012 | 38 | 87 |
| 2013 | 56 | 93 |
| 2014 | 57 | 108 |
| 2015 | 52 | 117 |
| 2016 | 85 | 118 |
| 2017 | 76 | 76 |
| 2018 | 83 | 92 |
| 2019 | 83 | 92 |
| 2020 | 73 | 92 |
| 2021 | 62 | 113 |
| 2022 | 59 | 80 |
| 2023 | 51 | 73 |
| 2024 | 67 | 96 |
| 2025 | 64 | 63 |
| 2026 | 26 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air heating apparatus and method for disassembling air heating apparatus1 Sep 2026US 12,723,777 B2Kyungdong Navien Co., Ltd.
- Hair styling appliance25 Aug 2026US 12,714,215 B2Dyson Technology Limited
- Furnace control systems and methods25 Aug 2026US 12,716,617 B2Johnson Controls Light Commercial IP GmbH
- Heat gun having flow guiding arrangement11 Aug 2026US 12,704,293 B2Zhejiang Prulde Electric Appliance Co., Ltd.
- Heating element with open-cell structure4 Aug 2026US 12,701,640 B2Kanthal AB
- Furnace with improved efficiency controls8 Oct 2026US 2026/0309369 A1Trane International Inc.
- Furnace combustion gas sensing and control systems and methods1 Oct 2026US 2026/0298468 A1
- Universal battery system for cordless devices1 Oct 2026US 2026/0298475 A1Enerco Group, Inc.
- System and method for heating and cooling24 Sep 2026US 2026/0287196 A1Daikin Industries, Ltd.
- Electric heating device with open structure and power regulator24 Sep 2026US 2026/0287208 A1Emmesteel S.R.L.
Most cited
By later US patents
- Electronic atomization cigarette779US 7,832,410 B2Best Partners Worldwide Limited · 2010
- Electronic atomization cigarette316US 8,393,331 B2Ruyan Investment (Holdings) Limited · 2013
- In-line electric heater for an aerosol delivery system176US 4,682,010 ASafeway Products, Inc. · 1987
- Tiltable and adjustably oscillatable portable electric heater/fan166US 4,703,152 AHolmes Products Corp. · 1987
- Operational control schemes for ventilated seat or bed assemblies159US 7,877,827 B2Amerigon Incorporated · 2011