Resonant converter
US-2026095092-A1 · Apr 2, 2026 · US
for reducing harmonics
for reducing harmonics · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F27/385 |
| Official title | {for reducing harmonics} |
| Display label | for reducing harmonics |
| Total patents | 47 |
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 | 3 |
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 9 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 5 |
| 2022 | 4 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Wound core
US-12394552-B2 · Aug 19, 2025 · US
Air-core reactors for use with power transmission systems
US-12014870-B2 · Jun 18, 2024 · US
Air-core reactors for use with power transmission systems
US-2023335324-A1 · Oct 19, 2023 · US
Current dependent inductivity
US-11763983-B2 · Sep 19, 2023 · US
Transformer arrangement
US-11694840-B2 · Jul 4, 2023 · US
Transformer arrangement
US-2022344093-A1 · Oct 27, 2022 · US
Wound core
US-2022285074-A1 · Sep 8, 2022 · US
Actively-controlled power transformer and method for controlling
US-11418031-B2 · Aug 16, 2022 · US
Fully integrated inversely weakly coupled power inductor
US-11309123-B2 · Apr 19, 2022 · US
Weakly coupled based harmonic rejection filter for feedback linearization power amplifier
US-11190149-B2 · Nov 30, 2021 · US
Actively-controlled power transformer and method for controlling
US-2021351588-A1 · Nov 11, 2021 · US
Fully integrated inversely weakly coupled power inductor
US-2021210278-A1 · Jul 8, 2021 · US
Current Dependent Inductivity
US-2021166867-A1 · Jun 3, 2021 · US
Reconfigurable electromagnetic wave shielding filter, wireless charger for vehicle having the same, and control method thereof
US-10886790-B2 · Jan 5, 2021 · US
Wireless charger having electromagnetic shielding function
US-10790083-B2 · Sep 29, 2020 · US
Reconfigurable electromagnetic wave shielding filter, wireless charger for vehicle having the same, and control method thereof
US-2020091777-A1 · Mar 19, 2020 · US
Apparatus for reducing electromagnetic wave in wireless power transmitter using reducing coil
US-10581277-B2 · Mar 3, 2020 · US
Wireless charger having electromagnetic shielding function
US-2019392984-A1 · Dec 26, 2019 · US
Weakly coupled based harmonic rejection filter for feedback linearization power amplifier
US-2019260335-A1 · Aug 22, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F27/385?
- CPC H01F27/385 is the Cooperative Patent Classification code for “for reducing harmonics.”
- How many patents are filed under CPC H01F27/385 (for reducing harmonics)?
- Our database includes 47 publications tagged with this CPC code.
- Is patent activity under CPC H01F27/385 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).