Water heating system including multi-function heat source apparatus
US-11149965-B2 · Oct 19, 2021 · US
Flow sensors
Flow sensors · 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 | F24D2220/044 |
| Official title | Flow sensors |
| Display label | Flow sensors |
| Total patents | 113 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 10 |
| 2018 | 7 |
| 2019 | 12 |
| 2020 | 17 |
| 2021 | 14 |
| 2022 | 18 |
| 2023 | 9 |
| 2024 | 12 |
| 2025 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gas heater for water and a gas water heater
US-2021199346-A1 · Jul 1, 2021 · US
Method and devices for controlling a fluid transportation network
US-11047582-B2 · Jun 29, 2021 · US
Heated Water Recirculation Control
US-2021095866-A1 · Apr 1, 2021 · US
Heated Water Availability Control
US-2021033287-A1 · Feb 4, 2021 · US
Hydronic system and method for operating such hydronic system
US-10890351-B2 · Jan 12, 2021 · US
Automatic firing rate control for a heat exchanger
US-10883729-B2 · Jan 5, 2021 · US
Water heater with flow bypass
US-10883743-B2 · Jan 5, 2021 · US
Water heating apparatus and water heating system
US-2020408442-A1 · Dec 31, 2020 · US
Water Heating Apparatus and Water Heating System
US-2020400346-A1 · Dec 24, 2020 · US
Hot water supplying apparatus and method for controlling same
US-2020386417-A1 · Dec 10, 2020 · US
Hot water supplying apparatus and method for utilizing waste heat of hot water supplying apparatus
US-2020386418-A1 · Dec 10, 2020 · US
Heating and hot-water supply apparatus
US-2020292179-A1 · Sep 17, 2020 · US
Heating furnace using self-calibration mode
US-10775053-B2 · Sep 15, 2020 · US
Water heating apparatus with immediate hot water supply function and water heating system
US-2020271356-A1 · Aug 27, 2020 · US
Determination of hydronic valve opening point
US-10739017-B2 · Aug 11, 2020 · US
Boiler system for both heating and hot water
US-2020191412-A1 · Jun 18, 2020 · US
Hot water supply system having preheating function and method for controlling same
US-10648680-B2 · May 12, 2020 · US
Fluid discharge event detector
US-2020141773-A1 · May 7, 2020 · US
Control device of water heating apparatus, water heating apparatus and control method thereof
US-10641523-B2 · May 5, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F24D2220/044?
- CPC F24D2220/044 is the Cooperative Patent Classification code for “Flow sensors.”
- How many patents are filed under CPC F24D2220/044 (Flow sensors)?
- Our database includes 113 publications tagged with this CPC code.
- Is patent activity under CPC F24D2220/044 growing?
- Publication counts under this code: 12 in 2024 vs 8 in 2025 (latest complete years).