Multi-layered metal frame power package
US-12531181-B2 · Jan 20, 2026 · US
Preventing or reducing surge voltages; oscillations
Preventing or reducing surge voltages; oscillations · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F27/343 |
| Official title | {Preventing or reducing surge voltages; oscillations} |
| Display label | Preventing or reducing surge voltages; oscillations |
| Total patents | 48 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 7 |
| 2017 | 9 |
| 2018 | 8 |
| 2019 | 6 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 2 |
| 2023 | 6 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Magnetic coil module and electrical connector including the magnetic coil module
US-2025292956-A1 · Sep 18, 2025 · US
Electronic device and power converter
US-11848622-B2 · Dec 19, 2023 · US
Coil and a Transformer That Have Improved Electromagnetic Shielding
US-2023335333-A1 · Oct 19, 2023 · US
Arrangement for overvoltage protection of subsea electrical apparatus
US-11705274-B2 · Jul 18, 2023 · US
Multi-Layered Metal Frame Power Package
US-2023215615-A1 · Jul 6, 2023 · US
Electronic apparatus
US-11611208-B2 · Mar 21, 2023 · US
Transformer arrangement and method for electrically connecting and disconnecting a transformer
US-2023011472-A1 · Jan 12, 2023 · US
Transformer assembly with medium frequency transformers
US-11480602-B2 · Oct 25, 2022 · US
Electronic device and power converter
US-2022115961-A1 · Apr 14, 2022 · US
Arrangement For Overvoltage Protection Of Subsea Electrical Apparatus
US-2021407730-A1 · Dec 30, 2021 · US
Surge voltage reduction member
US-11004594-B2 · May 11, 2021 · US
Electronic apparatus
US-2021119437-A1 · Apr 22, 2021 · US
Transformer Assembly With Medium Frequency Transformers
US-2021018554-A1 · Jan 21, 2021 · US
Stationary induction apparatus
US-10665382-B2 · May 26, 2020 · US
Docking module for a current transformer for preventing overvoltages and a current transformer having a docking module
US-10574050-B2 · Feb 25, 2020 · US
Multiphase transformer
US-2019311838-A1 · Oct 10, 2019 · US
Reactor having terminal block
US-10438738-B2 · Oct 8, 2019 · US
Stationary induction apparatus
US-10283259-B2 · May 7, 2019 · US
Current transformer and direct current source based on current transformer
US-10276301-B2 · Apr 30, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F27/343?
- CPC H01F27/343 is the Cooperative Patent Classification code for “Preventing or reducing surge voltages; oscillations.”
- How many patents are filed under CPC H01F27/343 (Preventing or reducing surge voltages; oscillations)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC H01F27/343 growing?
- Publication counts under this code: 6 in 2023 vs 1 in 2025 (latest complete years).