F24H 9/1809
For water heaters
Official title: for water heaters
F24H9/1809 (For water heaters) appears on 533 US grants and 599 published applications in this corpus.
Search patents in F24H- Granted patents
- 533
- Published applications
- 599
- Assignees
- 354
- Inventors
- 1,360
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 13 | 0 |
| 1978 | 7 | 0 |
| 1979 | 6 | 0 |
| 1980 | 9 | 0 |
| 1981 | 11 | 0 |
| 1982 | 3 | 0 |
| 1983 | 11 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 15 | 0 |
| 2001 | 12 | 4 |
| 2002 | 9 | 5 |
| 2003 | 6 | 3 |
| 2004 | 6 | 5 |
| 2005 | 4 | 4 |
| 2006 | 5 | 5 |
| 2007 | 3 | 7 |
| 2008 | 3 | 10 |
| 2009 | 3 | 10 |
| 2010 | 4 | 14 |
| 2011 | 8 | 12 |
| 2012 | 6 | 18 |
| 2013 | 6 | 20 |
| 2014 | 15 | 26 |
| 2015 | 12 | 28 |
| 2016 | 12 | 27 |
| 2017 | 23 | 19 |
| 2018 | 20 | 43 |
| 2019 | 34 | 40 |
| 2020 | 35 | 52 |
| 2021 | 32 | 48 |
| 2022 | 35 | 42 |
| 2023 | 25 | 36 |
| 2024 | 28 | 40 |
| 2025 | 28 | 51 |
| 2026 | 12 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus and method for microwave heating of fluids1 Sep 2026US 12,727,062 B21863815 Ontario Limited
- Burner and water heater comprising same25 Aug 2026US 12,716,615 B2Kyungdong Navien Co., Ltd.
- Electric heating device25 Aug 2026US 12,720,644 B2Eberspacher catem GmbH & Co.KG
- Dish washing machine using induction heating4 Aug 2026US 12,697,008 B2K.D.W. Company Limited
- Heating element with open-cell structure4 Aug 2026US 12,701,640 B2Kanthal AB
- Flow Through Heaters and Methods of Manufacture Thereof8 Oct 2026US 2026/0309364 A1Otter Controls Limited
- Liquid heating device27 Aug 2026US 2026/0251351 A1Toshiba Lighting & Technology Corporation
- Heat exchanger and water heating apparatus having same20 Aug 2026US 2026/0243465 A1Kyungdong Navien Co., Ltd.
- Electric heater for vehicle6 Aug 2026US 2026/0227093 A1I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini
- Heating device30 Jul 2026US 2026/0218941 A1Valeo Systemes Thermiques
Most cited
By later US patents
- Water heater with integral burner71US 5,355,841 ASABH (U.S.) Water Heater Group, Inc. · 1994
- Water heater with low NO.sub.x ceramic burner67US 5,511,516 ASABH (U.S.) Water Heater Group, Inc. · 1996
- Low emission combustion system63US 6,145,501 ACarrier Corporation · 2000
- Water heater with flame spill-out prevention arrangement44US 4,924,816 AMor-Flo Industries, Inc. · 1990
- Power-vented, direct-vent water heater42US 5,697,330 ARheem Manufacturing Company · 1997