F24H 9/0052
Details: for air heaters
Official title: {for air heaters}
F24H9/0052 (Details: for air heaters) appears on 212 US grants and 298 published applications in this corpus.
Search patents in F24H- Granted patents
- 212
- Published applications
- 298
- Assignees
- 172
- Inventors
- 561
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 10 |
| 2011 | 0 | 9 |
| 2012 | 4 | 17 |
| 2013 | 9 | 16 |
| 2014 | 9 | 23 |
| 2015 | 4 | 27 |
| 2016 | 16 | 25 |
| 2017 | 17 | 14 |
| 2018 | 23 | 13 |
| 2019 | 13 | 17 |
| 2020 | 12 | 23 |
| 2021 | 13 | 23 |
| 2022 | 16 | 14 |
| 2023 | 13 | 14 |
| 2024 | 12 | 19 |
| 2025 | 16 | 12 |
| 2026 | 8 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat gun having flow guiding arrangement11 Aug 2026US 12,704,293 B2Zhejiang Prulde Electric Appliance Co., Ltd.
- Hot brush4 Aug 2026US 12,696,965 B2SharkNinja Operating LLC
- Heating element with open-cell structure4 Aug 2026US 12,701,640 B2Kanthal AB
- Structured body for heating gas23 Jun 2026US 12,661,628 B2Topsoe A/S
- Electric heater system31 Mar 2026US 12,590,730 B2Watlow Electric Manufacturing Company
- Gas heater13 Aug 2026US 2026/0235321 A1Tutco, Inc.
- Electric heater system6 Aug 2026US 2026/0227095 A1Watlow Electric Manufacturing Company
- Forced Air Furnace with a Novel Multi-Path Heat Exchanger Section6 Aug 2026US 2026/0227096 A1
- Fuel gas heating furnace23 Jul 2026US 2026/0210581 A1Changzhou Wellife Furnace Co., Ltd.
- Bed heating device with mattress heating function and bed frame apparatus provided with same9 Jul 2026US 2026/0191335 A1SEWON INTELLIGENCE Co., Ltd
Most cited
By later US patents
- Humidifier56US 4,257,389 A1981
- Hand held appliance37US 10,117,491 B2Dyson Technology Limited · 2018
- Hot air furnace with improved heat exchanger construction27US 3,940,837 AThe Singer Company · 1976
- Hand held appliance27US 9,675,157 B2Dyson Technology Limited · 2017
- Modular infrared space heater device22US 4,309,594 A1982