Universal AC/DC current sensor and isolator
US-12488939-B2 · Dec 2, 2025 · US
Circuit arrangements
Circuit arrangements · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01F38/32 |
| Official title | Circuit arrangements |
| Display label | Circuit arrangements |
| Total patents | 63 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 7 |
| 2020 | 14 |
| 2021 | 9 |
| 2022 | 7 |
| 2023 | 5 |
| 2024 | 4 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Current transformer polarity verification
US-2025322988-A1 · Oct 16, 2025 · US
Current sensors employing Rogowski coils and methods of using same
US-12292459-B2 · May 6, 2025 · US
Measurement transformer including a printed circuit board
US-12020844-B2 · Jun 25, 2024 · US
Device and method for harvesting energy from a power line magnetic field
US-11989044-B2 · May 21, 2024 · US
Bus bar for minimizing AC loss in transformer and method of designing the same
US-11990270-B2 · May 21, 2024 · US
Self-calibration method for self-powered single CT current sensor
US-11946957-B2 · Apr 2, 2024 · US
Transformer arrangement, circuit arrangement and method for operating a transformer arrangement
US-11848150-B2 · Dec 19, 2023 · US
Device and method for harvesting energy from a power line magnetic field
US-2023350440-A1 · Nov 2, 2023 · US
Device and method for harvesting energy from a power line magnetic field
US-11709511-B2 · Jul 25, 2023 · US
Circuit breaker
US-11676787-B2 · Jun 13, 2023 · US
Air-core inductor assembly
US-11621124-B2 · Apr 4, 2023 · US
Kind of self-powered current sensor with sudden change current detection capability used in low-voltage distribution system
US-11536750-B2 · Dec 27, 2022 · US
Current Sensors Employing Rogowski Coils And Methods Of Using Same
US-2022252642-A1 · Aug 11, 2022 · US
Current sensing device
US-11385265-B2 · Jul 12, 2022 · US
Bus bar for minimizing ac loss in transformer and method of designing the same
US-2022165490-A1 · May 26, 2022 · US
Current transformer, protection device and electrical circuit breaker including such a transformer
US-11295885-B2 · Apr 5, 2022 · US
Device and method for harvesting energy from a power line magnetic field
US-2022037886-A1 · Feb 3, 2022 · US
Or relating to protection relays
US-11223165-B2 · Jan 11, 2022 · US
Current transformer
US-2021265110-A1 · Aug 26, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F38/32?
- CPC H01F38/32 is the Cooperative Patent Classification code for “Circuit arrangements.”
- How many patents are filed under CPC H01F38/32 (Circuit arrangements)?
- Our database includes 63 publications tagged with this CPC code.
- Is patent activity under CPC H01F38/32 growing?
- Publication counts under this code: 4 in 2024 vs 5 in 2025 (latest complete years).