Reversible fan
US-2022364567-A1 · Nov 17, 2022 · US
reversible fans
reversible fans · 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 | F04D19/005 |
| Official title | {reversible fans} |
| Display label | reversible fans |
| Total patents | 88 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 9 |
| 2017 | 7 |
| 2018 | 8 |
| 2019 | 11 |
| 2020 | 11 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 11 |
| 2024 | 7 |
| 2025 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Reversible fan
US-2022364570-A1 · Nov 17, 2022 · US
Edge-lit light kit for ceiling fans
US-11454244-B2 · Sep 27, 2022 · US
Axial ventilator having noise reducing fan wheel blades
US-11391282-B2 · Jul 19, 2022 · US
Illumination fan
US-11248616-B2 · Feb 15, 2022 · US
Variable Pitch Fan Control System
US-2021372316-A1 · Dec 2, 2021 · US
Variable pitch fan pitch limit
US-11162507-B2 · Nov 2, 2021 · US
Methods and apparatus for controlling fan devices
US-2021293249-A1 · Sep 23, 2021 · US
Methods and apparatus for controlling fan devices
US-11028854-B2 · Jun 8, 2021 · US
Fan or pump arrangement and operating method
US-10987704-B2 · Apr 27, 2021 · US
Aerodynamic Anti-Rotation Device
US-2021033099-A1 · Feb 4, 2021 · US
Illumination fan
US-2021010480-A1 · Jan 14, 2021 · US
Ceiling fan for establishing a system for local control of a space
US-2020396295-A1 · Dec 17, 2020 · US
Blast fan
US-10837345-B2 · Nov 17, 2020 · US
Illumination fan
US-10830243-B2 · Nov 10, 2020 · US
Edge-Lit Light Kit for Ceiling Fans
US-2020340487-A1 · Oct 29, 2020 · US
Axial Ventilator Having Noise Reducing Fan Wheel Blades
US-2020277962-A1 · Sep 3, 2020 · US
Propeller-shaped impeller and railway carriage air-conditioning apparatus
US-2020269885-A1 · Aug 27, 2020 · US
Variable pitch fan pitch limit
US-2020232476-A1 · Jul 23, 2020 · US
Reversible flow fan
US-10662973-B2 · May 26, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D19/005?
- CPC F04D19/005 is the Cooperative Patent Classification code for “reversible fans.”
- How many patents are filed under CPC F04D19/005 (reversible fans)?
- Our database includes 88 publications tagged with this CPC code.
- Is patent activity under CPC F04D19/005 growing?
- Publication counts under this code: 7 in 2024 vs 10 in 2025 (latest complete years).