Isolation transformer including a ground ring
US-2025364175-A1 · Nov 27, 2025 · US
Fixed transformers not covered by group H01F19/00
Fixed transformers not covered by group H01F19/00 · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F30/00 |
| Official title | Fixed transformers not covered by group H01F19/00 |
| Display label | Fixed transformers not covered by group H01F19/00 |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Substrate module and power module for transformer
US-12289835-B2 · Apr 29, 2025 · US
Pulse charging of a capacitor
US-12230994-B2 · Feb 18, 2025 · US
Method for obtaining an improved transformer design for a power plant
US-12175171-B2 · Dec 24, 2024 · US
A method for obtaining an improved transformer design for a power plant
US-2024330541-A1 · Oct 3, 2024 · US
Transformer and power supply device with transformer
US-11862384-B2 · Jan 2, 2024 · US
Substrate module and power module for transformer
US-2023040151-A1 · Feb 9, 2023 · US
Pulse charging of a capacitor
US-2022302742-A1 · Sep 22, 2022 · US
Transformer and power supply device with transformer
US-2022076880-A1 · Mar 10, 2022 · US
Coil and method for forming a coil
US-10964470-B2 · Mar 30, 2021 · US
Three-phase reactor including vibration suppressing structure part
US-10910146-B2 · Feb 2, 2021 · US
Device
US-10763026-B2 · Sep 1, 2020 · US
Radiofrequency (RF) filter for multi-frequency RF bias
US-10715095-B2 · Jul 14, 2020 · US
Circuit arrangement
US-10652989-B2 · May 12, 2020 · US
Three-phase reactor including vibration suppressing structure part
US-2020058438-A1 · Feb 20, 2020 · US
Three-phase reactor including vibration suppressing structure part
US-10529481-B2 · Jan 7, 2020 · US
Coil and method for forming a coil
US-2019385784-A1 · Dec 19, 2019 · US
Circuit arrangement
US-2019327822-A1 · Oct 24, 2019 · US
Coil and method for forming a coil
US-10403430-B2 · Sep 3, 2019 · US
Wire, manufacturing method therefor, and coil component
US-10374276-B2 · Aug 6, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F30/00?
- CPC H01F30/00 is the Cooperative Patent Classification code for “Fixed transformers not covered by group H01F19/00.”
- How many patents are filed under CPC H01F30/00 (Fixed transformers not covered by group H01F19/00)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC H01F30/00 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).