F24H 3/02
Air heaters: with forced circulation
Official title: with forced circulation
F24H3/02 (Air heaters: with forced circulation) appears on 1,592 US grants and 1,509 published applications in this corpus.
Search patents in F24H- Granted patents
- 1,592
- Published applications
- 1,509
- Assignees
- 820
- Inventors
- 3,212
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 16 | 0 |
| 1978 | 25 | 0 |
| 1979 | 20 | 0 |
| 1980 | 33 | 0 |
| 1981 | 23 | 0 |
| 1982 | 31 | 0 |
| 1983 | 21 | 0 |
| 1984 | 21 | 0 |
| 1985 | 33 | 0 |
| 1986 | 26 | 0 |
| 1987 | 30 | 0 |
| 1988 | 26 | 0 |
| 1989 | 23 | 0 |
| 1990 | 26 | 0 |
| 1991 | 35 | 0 |
| 1992 | 20 | 0 |
| 1993 | 22 | 0 |
| 1994 | 40 | 0 |
| 1995 | 25 | 0 |
| 1996 | 21 | 0 |
| 1997 | 18 | 0 |
| 1998 | 21 | 0 |
| 1999 | 22 | 0 |
| 2000 | 25 | 0 |
| 2001 | 20 | 3 |
| 2002 | 19 | 11 |
| 2003 | 17 | 23 |
| 2004 | 18 | 25 |
| 2005 | 26 | 44 |
| 2006 | 23 | 29 |
| 2007 | 10 | 35 |
| 2008 | 11 | 54 |
| 2009 | 17 | 45 |
| 2010 | 18 | 42 |
| 2011 | 23 | 71 |
| 2012 | 32 | 74 |
| 2013 | 43 | 78 |
| 2014 | 45 | 87 |
| 2015 | 44 | 95 |
| 2016 | 69 | 89 |
| 2017 | 62 | 59 |
| 2018 | 72 | 81 |
| 2019 | 69 | 83 |
| 2020 | 64 | 79 |
| 2021 | 44 | 98 |
| 2022 | 54 | 61 |
| 2023 | 45 | 64 |
| 2024 | 52 | 77 |
| 2025 | 56 | 57 |
| 2026 | 24 | 45 |
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.
- Universal battery system for cordless devices1 Oct 2026US 2026/0298475 A1Enerco Group, Inc.
- Food transportation systems17 Sep 2026US 2026/0276240 A1Vesture Corporation
- Air heating apparatus17 Sep 2026US 2026/0276241 A1Kyungdong Navien Co., Ltd.
- Charging system and charging cradle for food transportation systems10 Sep 2026US 2026/0266508 A1Vesture Corporation
Most cited
By later US patents
- 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
- Combination heater-light-ventilator unit150US 4,681,024 AFasco Industries, Inc. · 1987
- Pivotable heater132US 6,321,034 B2The Holmes Group, Inc. · 2001