F24H 4/02
Water heaters
F24H4/02 (Water heaters) appears on 402 US grants and 587 published applications in this corpus.
Search patents in F24H- Granted patents
- 402
- Published applications
- 587
- Assignees
- 219
- Inventors
- 1,030
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 9 | 0 |
| 1984 | 5 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 8 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 3 |
| 2002 | 5 | 3 |
| 2003 | 2 | 4 |
| 2004 | 4 | 3 |
| 2005 | 0 | 4 |
| 2006 | 4 | 6 |
| 2007 | 1 | 3 |
| 2008 | 2 | 7 |
| 2009 | 3 | 7 |
| 2010 | 2 | 10 |
| 2011 | 3 | 14 |
| 2012 | 1 | 25 |
| 2013 | 5 | 28 |
| 2014 | 7 | 18 |
| 2015 | 20 | 33 |
| 2016 | 21 | 33 |
| 2017 | 23 | 14 |
| 2018 | 18 | 30 |
| 2019 | 24 | 24 |
| 2020 | 14 | 34 |
| 2021 | 21 | 27 |
| 2022 | 24 | 36 |
| 2023 | 24 | 27 |
| 2024 | 29 | 65 |
| 2025 | 29 | 83 |
| 2026 | 28 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modular HVAC-SHW system and a method of integrating thereof8 Sep 2026US 12,729,865 B2Carrier Corporation
- Tank water heater and water heating system8 Sep 2026US 12,729,879 B2A. O. Smith Corporation
- Air heating apparatus and method for disassembling air heating apparatus1 Sep 2026US 12,723,777 B2Kyungdong Navien Co., Ltd.
- Machine learning of heat pump system water usage patterns for optimized heat pump performance1 Sep 2026US 12,723,778 B2Bradford White Corporation
- Energy management systems18 Aug 2026US 12,710,184 B2
- Water heating system and device8 Oct 2026US 2026/0309340 A1Mixergy Limited
- Heating installation1 Oct 2026US 2026/0298483 A1Energy Machines ApS
- Systems and methods for integrating a water heating unit and a heat pump1 Oct 2026US 2026/0298489 A1
- Systems and methods for integrating a water heating unit and a heat pump1 Oct 2026US 2026/0298490 A1
- Machine learning of heat pump system water usage patterns for optimized heat pump performance1 Oct 2026US 2026/0298499 A1Bradford White Corporation
Most cited
By later US patents
- Blood warmer204US 5,125,069 ANetherlands Health Sciences · 1992
- Waste heat energy recovery system82US 4,293,323 A1981
- Combined refrigerator water heater70US 5,220,807 ADavis Energy Group, Inc. · 1993
- Control of outdoor air source water heating using variable-speed heat pump54US 5,052,186 AElectric Power Research Institute, Inc. · 1991
- Integrated heat pump water heater46US 4,598,557 ASouthern Company Services, Inc. · 1986