Z-type hexaferrite having a nanocrystalline structure
US-2021261433-A1 · Aug 26, 2021 · US
Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure
Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F1/348 |
| Official title | {Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure} |
| Display label | Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure |
| Total patents | 156 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 10 |
| 2017 | 8 |
| 2018 | 11 |
| 2019 | 11 |
| 2020 | 6 |
| 2021 | 25 |
| 2022 | 22 |
| 2023 | 22 |
| 2024 | 14 |
| 2025 | 17 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Bismuth ruthenium m-type hexaferrite
US-2021179442-A1 · Jun 17, 2021 · US
Magnetodielectric y-phase strontium hexagonal ferrite materials formed by sodium substitution
US-10984928-B2 · Apr 20, 2021 · US
Ruthenium doped z-type hexaferrite
US-2021043346-A1 · Feb 11, 2021 · US
Magnetic material, method for producing the same, and electromagnetic wave absorbing sheet
US-2021012936-A1 · Jan 14, 2021 · US
Radiofrequency and other electronic devices formed from enhanced resonant frequency hexaferrite materials
US-10862184-B2 · Dec 8, 2020 · US
Particles of magnetoplumbite-type hexagonal ferrite, method for manufacturing the same, and radio wave absorber
US-2020335247-A1 · Oct 22, 2020 · US
Mo-doped Co2Z-type ferrite composite material for use ultra-high frequency antennas
US-10766786-B2 · Sep 8, 2020 · US
Magnetic tape having characterized magnetic layer and magnetic tape device
US-10770105-B2 · Sep 8, 2020 · US
Magnetic tape, magnetic tape cartridge, and magnetic recording and reproducing apparatus
US-2020279679-A1 · Sep 3, 2020 · US
Magnetic powder for magnetic recording medium, and production method thereof
US-2020161035-A1 · May 21, 2020 · US
Co2 Z-type ferrite composite material for use in ultra-high frequency antennas
US-10468169-B2 · Nov 5, 2019 · US
Enhanced magnetic loss y-phase hexagonal ferrite for magnetodielectric antenna applications
US-10461436-B2 · Oct 29, 2019 · US
Textured planar m-type hexagonal ferrites and methods of use thereof
US-2019318858-A1 · Oct 17, 2019 · US
Incorporation of oxides into ferrite material for improved radio radiofrequency properties
US-2019267164-A1 · Aug 29, 2019 · US
Polytetrafluoroethylene hexaferrite composites
US-2019264005-A1 · Aug 29, 2019 · US
Incorporation of oxides into ferrite material for improved radio radiofrequency properties
US-10276287-B2 · Apr 30, 2019 · US
Magnetic tape and magnetic tape device
US-2019027172-A1 · Jan 24, 2019 · US
Magnetic tape and magnetic tape device
US-2019027171-A1 · Jan 24, 2019 · US
Magnetodielectric y-phase strontium hexagonal ferrite materials formed by sodium substitution
US-2019019605-A1 · Jan 17, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F1/348?
- CPC H01F1/348 is the Cooperative Patent Classification code for “Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure.”
- How many patents are filed under CPC H01F1/348 (Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure)?
- Our database includes 156 publications tagged with this CPC code.
- Is patent activity under CPC H01F1/348 growing?
- Publication counts under this code: 14 in 2024 vs 17 in 2025 (latest complete years).