F24H 9/1854
For air heaters
Official title: for air heaters
F24H9/1854 (For air heaters) appears on 310 US grants and 382 published applications in this corpus.
Search patents in F24H- Granted patents
- 310
- Published applications
- 382
- Assignees
- 215
- Inventors
- 782
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 5 | 3 |
| 2003 | 1 | 9 |
| 2004 | 6 | 8 |
| 2005 | 4 | 15 |
| 2006 | 9 | 6 |
| 2007 | 3 | 15 |
| 2008 | 6 | 10 |
| 2009 | 5 | 14 |
| 2010 | 7 | 14 |
| 2011 | 9 | 9 |
| 2012 | 4 | 16 |
| 2013 | 11 | 15 |
| 2014 | 11 | 17 |
| 2015 | 10 | 30 |
| 2016 | 18 | 22 |
| 2017 | 12 | 9 |
| 2018 | 16 | 21 |
| 2019 | 17 | 30 |
| 2020 | 15 | 25 |
| 2021 | 11 | 28 |
| 2022 | 17 | 15 |
| 2023 | 12 | 17 |
| 2024 | 16 | 14 |
| 2025 | 16 | 13 |
| 2026 | 4 | 6 |
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.
- Heating element with open-cell structure4 Aug 2026US 12,701,640 B2Kanthal AB
- Method for producing a heating device, and heating device16 Jun 2026US 12,656,020 B2Truma Gerätetechnik GmbH & Co. KG
- Gas furnace and air conditioner having the same5 May 2026US 12,618,559 B2LG Electronics Inc.
- Process for manufacturing a PTC heating element and PTC heating element23 Dec 2025US 12,507,321 B2Eberspächer catem Hermsdorf GmbH & Co. KG
- Gas heater13 Aug 2026US 2026/0235321 A1Tutco, Inc.
- Parking heater25 Jun 2026US 2026/0177283 A1Shenzhen Yisi Technology Co., Ltd.
- Air handling unit with a heating module11 Jun 2026US 2026/0160431 A1Carrier Corporation
- Encapsulated bus circuit for fluid heating systems26 Mar 2026US 2026/0085856 A1Watlow Electric Manufacturing Company
- Variable-frequency heater12 Mar 2026US 2026/0071780 A1Zhongshan Powtek Appliances Mfg., Ltd.
Most cited
By later US patents
- Flat panel heater121US 6,480,672 B1The Holmes Group, Inc. · 2002
- Heating heat exchanger with electric heat emitter90US 5,995,711 ADenso Corporation · 1999
- Finned PTC air heater assembly for heating an automotive passenger compartment71US 5,256,857 ATexas Instruments Incorporated · 1993
- Ceiling fan with attachable heater housing having an additional fan therein70US 5,668,920 APelonis USA, Ltd. · 1997
- Core unit of heat exchanger having electric heater67US 6,178,292 B1Denso Corporation · 2001