Dry high voltage instrument transformer
US-12597557-B2 · Apr 7, 2026 · US
Instruments transformers
Instruments transformers · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F38/20 |
| Official title | Instruments transformers |
| Display label | Instruments transformers |
| Total patents | 60 |
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 | 10 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 2 |
| 2022 | 8 |
| 2023 | 6 |
| 2025 | 4 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Power adapter
US-2026038734-A1 · Feb 5, 2026 · US
Method for manufacturing an electric component
US-12510564-B2 · Dec 30, 2025 · US
Electrosurgical generator
US-12343061-B2 · Jul 1, 2025 · US
Inductor
US-2025182951-A1 · Jun 5, 2025 · US
Inductor
US-12255005-B2 · Mar 18, 2025 · US
Circuit breakers with shaped neutral busbars and/or load terminals and related methods
US-11817282-B2 · Nov 14, 2023 · US
Automatic calibration system and method for passive low-power voltage transformer
US-11817247-B2 · Nov 14, 2023 · US
Automatic calibration system and method for passive low-power voltage transformer
US-2023238165-A1 · Jul 27, 2023 · US
Method for manufacturing an electric component and electric component
US-2023152351-A1 · May 18, 2023 · US
Air-core inductor assembly
US-11621124-B2 · Apr 4, 2023 · US
High-voltage device having ceramic spacer elements, and use thereof
US-11605488-B2 · Mar 14, 2023 · US
Dry High Voltage Instrument Transformer
US-2022384094-A1 · Dec 1, 2022 · US
Non-contact magnetostrictive sensors and methods of operation of such sensors
US-11486773-B2 · Nov 1, 2022 · US
Instrument transformer and method to isolate parts
US-2022319770-A1 · Oct 6, 2022 · US
Inductor
US-2022285072-A1 · Sep 8, 2022 · US
Circuit breakers with shaped neutral busbars and/or load terminals and related methods
US-2022262590-A1 · Aug 18, 2022 · US
Instrument transformer and method to isolate parts
US-2022262560-A1 · Aug 18, 2022 · US
Electrosurgical generator
US-2022192726-A1 · Jun 23, 2022 · US
Circuit breakers with shaped neutral busbars and/or load terminals and related methods
US-11322328-B2 · May 3, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F38/20?
- CPC H01F38/20 is the Cooperative Patent Classification code for “Instruments transformers.”
- How many patents are filed under CPC H01F38/20 (Instruments transformers)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC H01F38/20 growing?
- Publication counts under this code: 6 in 2023 vs 4 in 2025 (latest complete years).