Heat pump apparatus and method for installing the same
US-2019390873-A1 · Dec 26, 2019 · US
Water heaters
Water heaters · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F24H4/02 |
| Official title | Water heaters |
| Display label | Water heaters |
| Total patents | 226 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 14 |
| 2017 | 8 |
| 2018 | 14 |
| 2019 | 16 |
| 2020 | 35 |
| 2021 | 26 |
| 2022 | 26 |
| 2023 | 17 |
| 2024 | 16 |
| 2025 | 39 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hybrid Heater
US-2019360225-A1 · Nov 28, 2019 · US
Refrigerant transfer control in multi mode air conditioner with hot water generator
US-2019360731-A1 · Nov 28, 2019 · US
Heat pump system and regulating method thereof
US-10473364-B2 · Nov 12, 2019 · US
Superhigh temperature heat pump system and method capableof preparing boiling water not lower than 100°c
US-2019316810-A1 · Oct 17, 2019 · US
Heat pump
US-10443900-B2 · Oct 15, 2019 · US
System for air-conditioning and hot-water supply
US-2019309989-A1 · Oct 10, 2019 · US
Heat pump water heater
US-10429084-B2 · Oct 1, 2019 · US
Heat-pump equipment
US-10429086-B2 · Oct 1, 2019 · US
Hybrid heater
US-10400466-B2 · Sep 3, 2019 · US
Heat pump apparatus
US-2019264964-A1 · Aug 29, 2019 · US
Heat pump-type heating device
US-10371421-B2 · Aug 6, 2019 · US
Heat source unit for refrigeration apparatus
US-2019170416-A1 · Jun 6, 2019 · US
Carbon dioxide environmental control system
US-2019151796-A1 · May 23, 2019 · US
Heat pump apparatus
US-2018347911-A1 · Dec 6, 2018 · US
Heat pump-type heating device
US-2018313586-A1 · Nov 1, 2018 · US
Apparatus and Methods for Heating Water with Refrigerant from Air Conditioning System
US-2018252434-A1 · Sep 6, 2018 · US
Heat pump water heater
US-2018238561-A1 · Aug 23, 2018 · US
Apparatus and method for hybrid water heating and air cooling and control thereof
US-10041702-B2 · Aug 7, 2018 · US
Heat utilizing apparatus
US-2018209689-A1 · Jul 26, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24H4/02?
- CPC F24H4/02 is the Cooperative Patent Classification code for “Water heaters.”
- How many patents are filed under CPC F24H4/02 (Water heaters)?
- Our database includes 226 publications tagged with this CPC code.
- Is patent activity under CPC F24H4/02 growing?
- Publication counts under this code: 16 in 2024 vs 39 in 2025 (latest complete years).