RF source protection
US-12414221-B2 · Sep 9, 2025 · US
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using ferromagnetic material
using ferromagnetic material · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01P1/215 |
| Official title | using ferromagnetic material |
| Display label | using ferromagnetic material |
| Total patents | 23 |
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 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Magnetic absorbers for passive intermodulation mitigation
US-12143066-B2 · Nov 12, 2024 · US
Rf source protection
US-2023380049-A1 · Nov 23, 2023 · US
Magnetic absorbers for passive intermodulation mitigation
US-2023261612-A1 · Aug 17, 2023 · US
Magnetic absorbers for passive intermodulation mitigation
US-11699976-B2 · Jul 11, 2023 · US
Noise filter and electrical and electronic equipment
US-11381213-B2 · Jul 5, 2022 · US
Magnetic absorbers for passive intermodulation mitigation
US-2022052643-A1 · Feb 17, 2022 · US
Magnetic absorbers for passive intermodulation mitigation
US-11165391-B2 · Nov 2, 2021 · US
Magnetic absorbers for passive intermodulation mitigation
US-2021265951-A1 · Aug 26, 2021 · US
Tunable frequency selective limiter
US-11024932-B1 · Jun 1, 2021 · US
Noise filter and electrical and electronic equipment
US-2021021252-A1 · Jan 21, 2021 · US
Biplanar tapered line frequency selective limiter
US-10707547-B2 · Jul 7, 2020 · US
Vertically meandered frequency selective limiter
US-10608310-B1 · Mar 31, 2020 · US
Biplanar tapered line frequency selective limiter
US-2019393578-A1 · Dec 26, 2019 · US
Frequency selective limiter
US-10461384-B2 · Oct 29, 2019 · US
Frequency selective limiter
US-2018366803-A1 · Dec 20, 2018 · US
Magnetoresistive effect device
US-2018309046-A1 · Oct 25, 2018 · US
Tunable magnonic crystal device and filtering method
US-10033078-B2 · Jul 24, 2018 · US
Magnetoresistive effect device
US-9966922-B2 · May 8, 2018 · US
Magnetoresistive effect device
US-2017345449-A1 · Nov 30, 2017 · US