Magnetorheological Fluid And Braking Device
US-2026094746-A1 · Apr 2, 2026 · US
the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence)
the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F1/442 |
| Official title | {the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence)} |
| Display label | the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence) |
| Total patents | 52 |
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 | 2 |
| 2016 | 6 |
| 2017 | 1 |
| 2018 | 9 |
| 2019 | 5 |
| 2020 | 6 |
| 2021 | 7 |
| 2022 | 4 |
| 2023 | 9 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Magnetic Fluid Composition
US-2025308736-A1 · Oct 2, 2025 · US
Controlling an iron and magnetic slurry in semiconductor assembly
US-2025054833-A1 · Feb 13, 2025 · US
Stretchable sensor and method of manufacturing the same and wearable device
US-11856691-B2 · Dec 26, 2023 · US
Method for producing nanoparticles and the nanoparticles produced therefrom
US-11781199-B2 · Oct 10, 2023 · US
Brush compositions for magnetic field-assisted finishing and related methods and uses thereof
US-2023312979-A1 · Oct 5, 2023 · US
Method of forming magnetic flux optimization for uniquely shaped designs
US-11742731-B2 · Aug 29, 2023 · US
Magnetorheological fluid and manufacturing method thereof
US-2023253135-A1 · Aug 10, 2023 · US
Method for producing nanoparticles and the nanoparticles produced therefrom
US-2023227944-A1 · Jul 20, 2023 · US
Composite magnetic material, magnetic core, and electronic component
US-11682510-B2 · Jun 20, 2023 · US
Method for producing nanoparticles and the nanoparticles produced therefrom
US-11618077-B2 · Apr 4, 2023 · US
Magnetic flux optimization for uniquely shaped designs
US-2023083543-A1 · Mar 16, 2023 · US
Stretchable sensor and method of manufacturing the same and wearable device
US-2022279646-A1 · Sep 1, 2022 · US
Method for producing nanoparticles and the nanoparticles produced therefrom
US-2022274170-A1 · Sep 1, 2022 · US
Ferromagnetic material with remote responsive control for dynamic cell culture
US-2022204911-A1 · Jun 30, 2022 · US
Method for producing nanoparticles and the nanoparticles produced therefrom
US-11370027-B2 · Jun 28, 2022 · US
Electromagnetically-induced cement concrete crack self-healing diisocyanate microcapsules and their preparation method
US-11208351-B2 · Dec 28, 2021 · US
Magneto-rheological elastomer
US-11145447-B2 · Oct 12, 2021 · US
Magnetic powder composite, antenna and electronic device, and method for producing the same
US-11114228-B2 · Sep 7, 2021 · US
Highly thermostable rare-earth permanent magnetic material, preparation method thereof and magnet containing the same
US-11101057-B2 · Aug 24, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F1/442?
- CPC H01F1/442 is the Cooperative Patent Classification code for “the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence).”
- How many patents are filed under CPC H01F1/442 (the magnetic component being a metal or alloy, e.g. Fe (H01F1/447 takes precedence))?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC H01F1/442 growing?
- Publication counts under this code: 9 in 2023 vs 2 in 2025 (latest complete years).