Heat exchanger
US-2025240851-A1 · Jul 24, 2025 · US
for water heaters
for 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 | F24H9/13 |
| Official title | for water heaters |
| Display label | for water heaters |
| Total patents | 37 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 7 |
| 2020 | 4 |
| 2021 | 7 |
| 2022 | 3 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Water heater expansion tank fitting tees
US-2024410508-A1 · Dec 12, 2024 · US
Temperature control apparatus
US-12092371-B2 · Sep 17, 2024 · US
Water heater expansion tank fitting tees
US-2024044548-A1 · Feb 8, 2024 · US
Fine bubble generator
US-11826715-B2 · Nov 28, 2023 · US
Fluid heating apparatus
US-2023184463-A1 · Jun 15, 2023 · US
Tank-based and tankless water heater systems
US-11629884-B2 · Apr 18, 2023 · US
Heating and hot water supply system
US-11555633-B2 · Jan 17, 2023 · US
Fine bubble generator
US-2022387946-A1 · Dec 8, 2022 · US
Heat pumps
US-2022325548-A1 · Oct 13, 2022 · US
Heating system enclosure
US-11300323-B2 · Apr 12, 2022 · US
Connector assembly for hose connection of hot water mat
US-11168822-B2 · Nov 9, 2021 · US
Supply-water warming system
US-2021262655-A1 · Aug 26, 2021 · US
Heat exchanger
US-11054188-B2 · Jul 6, 2021 · US
Heating system enclosure
US-2021199341-A1 · Jul 1, 2021 · US
Hot water supply device
US-2021156593-A1 · May 27, 2021 · US
Heating and hot water supply system
US-2021123631-A1 · Apr 29, 2021 · US
Heating and hot water supply system
US-2021123606-A1 · Apr 29, 2021 · US
Temperature control apparatus
US-2020318861-A1 · Oct 8, 2020 · US
Temperature control apparatus
US-2020258762-A1 · Aug 13, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24H9/13?
- CPC F24H9/13 is the Cooperative Patent Classification code for “for water heaters.”
- How many patents are filed under CPC F24H9/13 (for water heaters)?
- Our database includes 37 publications tagged with this CPC code.
- Is patent activity under CPC F24H9/13 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).