F24H 9/1872
Ptc resistor
Official title: {PTC resistor}
F24H9/1872 (Ptc resistor) appears on 161 US grants and 199 published applications in this corpus.
Search patents in F24H- Granted patents
- 161
- Published applications
- 199
- Assignees
- 89
- Inventors
- 378
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 1 | 8 |
| 2004 | 5 | 7 |
| 2005 | 3 | 12 |
| 2006 | 5 | 4 |
| 2007 | 3 | 12 |
| 2008 | 6 | 7 |
| 2009 | 3 | 12 |
| 2010 | 5 | 7 |
| 2011 | 7 | 7 |
| 2012 | 4 | 8 |
| 2013 | 6 | 6 |
| 2014 | 4 | 9 |
| 2015 | 4 | 13 |
| 2016 | 8 | 6 |
| 2017 | 8 | 1 |
| 2018 | 8 | 13 |
| 2019 | 8 | 17 |
| 2020 | 9 | 9 |
| 2021 | 3 | 17 |
| 2022 | 10 | 4 |
| 2023 | 5 | 6 |
| 2024 | 7 | 7 |
| 2025 | 5 | 4 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for manufacturing a PTC heating element and PTC heating element23 Dec 2025US 12,507,321 B2Eberspächer catem Hermsdorf GmbH & Co. KG
- Heating body of an electric radiator9 Dec 2025US 12,492,843 B2Valeo Systemes Thermiques
- PTC heater4 Nov 2025US 12,460,838 B2Hanon Systems
- Thin-walled tube heater for fluid27 May 2025US 12,313,297 B2Lexmark International, Inc.
- Electric heating device18 Feb 2025US 12,232,225 B2Eberspacher catem GmbH & Co.KG
- Electric heating device for a motor vehicle21 Aug 2025US 2025/0264247 A1Valeo Systemes Thermiques
- Heater module24 Apr 2025US 2025/0129969 A1BendPak, Inc.
- Heating body of an electric radiator10 Apr 2025US 2025/0116424 A1Valeo Systemes Thermiques
- Electric radiator of a heating, ventilation and/or air-conditioning system13 Feb 2025US 2025/0050710 A1Valeo Systemes Thermiques
- Heating device and method for producing a heating device1 Aug 2024US 2024/0255183 A1
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