F24H 9/139
Continuous flow heaters
Official title: {Continuous flow heaters}
F24H9/139 (Continuous flow heaters) appears on 49 US grants and 68 published applications in this corpus.
Search patents in F24H- Granted patents
- 49
- Published applications
- 68
- Assignees
- 45
- Inventors
- 150
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 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 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 3 | 2 |
| 2015 | 0 | 2 |
| 2016 | 0 | 3 |
| 2017 | 2 | 4 |
| 2018 | 6 | 9 |
| 2019 | 3 | 7 |
| 2020 | 7 | 7 |
| 2021 | 7 | 8 |
| 2022 | 6 | 10 |
| 2023 | 3 | 0 |
| 2024 | 5 | 2 |
| 2025 | 2 | 3 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Heat exchanger and washing apparatus including heat exchanger25 Feb 2025US 12,235,018 B2KYOCERA Corporation
- Vertically stacked dual heat engine rack11 Jun 2024US 12,007,146 B2Rinnai America Corporation
- Electric heating device23 Apr 2024US 11,965,675 B2Eberspacher catem GmbH & Co.KG
- Energy efficient water heater6 Feb 2024US 11,892,199 B2
- Water heater system including upper pipes and lower pipes13 Aug 2026US 2026/0235324 A1Daesung Celtic Enersys Co., Ltd
- Water heater pipe quick-connect structure25 Jun 2026US 2026/0177285 A1Foshan Christie Leisure Technology Co., Ltd.
- Valve device and gas water heater2 Apr 2026US 2026/0092651 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- System and method for water connection convertibility5 Feb 2026US 2026/0036335 A1Bradford White Corporation
- Connected pool and spa heater system4 Dec 2025US 2025/0369245 A1Pentair Water Pool and Spa, Inc.
Most cited
By later US patents
- Electric continuous flow heater32US 4,584,463 AStiebel Eltron GmbH & Co. KG · 1986
- Magnetic water conditioning device14US 4,662,314 AMor-Flo Industries, Inc. · 1987
- On-demand water heating system9US 8,787,742 B2Keltech, Inc. · 2014
- Condensing combustion apparatus8US 10,823,455 B2Kyungdong Navien Co., Ltd. · 2020
- Hot water heater7US 4,940,024 A1990