Shunt reactor with auxiliary power
US-12525382-B2 · Jan 13, 2026 · US
Cooling by special gases or non-ambient air
Cooling by special gases or non-ambient air · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F27/20 |
| Official title | Cooling by special gases or non-ambient air |
| Display label | Cooling by special gases or non-ambient air |
| Total patents | 52 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 7 |
| 2017 | 8 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 8 |
| 2021 | 2 |
| 2022 | 5 |
| 2023 | 2 |
| 2024 | 8 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Transformer cooling system and transformer installation
US-12308159-B2 · May 20, 2025 · US
Coil device for generating plasma and semiconductor equipment
US-2025095962-A1 · Mar 20, 2025 · US
The insulating gas mixture for replacing sf6, as well as its formulation method and application
US-2024355538-A1 · Oct 24, 2024 · US
Electrical device having heat generating components with improved heat removal using turbulent flow
US-12062478-B2 · Aug 13, 2024 · US
Induction coil apparatus and radio frequency matching network incorporating the same
US-2024249869-A1 · Jul 25, 2024 · US
Cooling structure for transformer
US-12033780-B2 · Jul 9, 2024 · US
Insulation assembly, transformer assembly, and dry type transformer
US-2024222000-A1 · Jul 4, 2024 · US
Magnetic component and method of forming
US-2024177912-A1 · May 30, 2024 · US
Magnetic component and method of forming
US-11887766-B2 · Jan 30, 2024 · US
Transformer with air-flow re-director
US-2024006111-A1 · Jan 4, 2024 · US
Electric device with forced direct cooling
US-2023268115-A1 · Aug 24, 2023 · US
Shunt reactor with auxiliary power
US-2023041583-A1 · Feb 9, 2023 · US
Heat exchanger package for a dry-type transformer
US-2022406510-A1 · Dec 22, 2022 · US
Inductors with core structure supporting multiple air flow modes
US-11508510-B2 · Nov 22, 2022 · US
Planar coil, and transformer, wireless power transmitter, and electromagnet provided with same
US-2022301757-A1 · Sep 22, 2022 · US
Magnetic component and method of forming
US-2022059272-A1 · Feb 24, 2022 · US
Transformer cooling system and transformer installation
US-2022037079-A1 · Feb 3, 2022 · US
Vehicle transformer
US-11062835-B2 · Jul 13, 2021 · US
Cooling structure for transformer
US-2021110957-A1 · Apr 15, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F27/20?
- CPC H01F27/20 is the Cooperative Patent Classification code for “Cooling by special gases or non-ambient air.”
- How many patents are filed under CPC H01F27/20 (Cooling by special gases or non-ambient air)?
- Our database includes 52 publications tagged with this CPC code.
- Is patent activity under CPC H01F27/20 growing?
- Publication counts under this code: 8 in 2024 vs 2 in 2025 (latest complete years).