Electromagnetic wave attenuator and electronic device
US-12476341-B2 · Nov 18, 2025 · US
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 | H01P1/23 |
| Official title | using ferromagnetic material |
| Display label | using ferromagnetic material |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 8 |
| 2024 | 3 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System with magnetic film for reducing passive intermodulation
US-12230854-B2 · Feb 18, 2025 · US
Magnetic absorbers for passive intermodulation mitigation
US-12143066-B2 · Nov 12, 2024 · US
Gyromagnetic nonlinear transmission line for radio frequency signal generation and pulse compression
US-12068519-B2 · Aug 20, 2024 · US
System with Magnetic Film for Reducing Passive Intermodulation
US-2024072404-A1 · Feb 29, 2024 · US
System with magnetic film for reducing passive intermodulation
US-11848471-B2 · Dec 19, 2023 · US
System with Magnetic Film for Reducing Passive Intermodulation
US-2023327308-A1 · Oct 12, 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
Gyromagnetic nonlinear transmission line for radio frequency signal generation and pulse compression
US-2023198116-A1 · Jun 22, 2023 · US
Electromagnetic wave attenuator and electronic device
US-2023145220-A1 · May 11, 2023 · US
Transversely tapered frequency selective limiter
US-11588218-B1 · Feb 21, 2023 · US
Transversely tapered frequency selective limiter
US-2023052113-A1 · Feb 16, 2023 · 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
Enabling attenuators for quantum microwave circuits in cryogenic temperature range
US-10790566-B2 · Sep 29, 2020 · US
Biplanar tapered line frequency selective limiter
US-10707547-B2 · Jul 7, 2020 · US
Enabling attenuators for quantum microwave circuits in cryogenic temperature range
US-2020144690-A1 · May 7, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01P1/23?
- CPC H01P1/23 is the Cooperative Patent Classification code for “using ferromagnetic material.”
- How many patents are filed under CPC H01P1/23 (using ferromagnetic material)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC H01P1/23 growing?
- Publication counts under this code: 3 in 2024 vs 2 in 2025 (latest complete years).