Absence of voltage detector
US-2026016511-A1 · Jan 15, 2026 · US
using conversion of DC into AC, e.g. with choppers
using conversion of DC into AC, e.g. with choppers · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01R19/18 |
| Official title | using conversion of DC into AC, e.g. with choppers |
| Display label | using conversion of DC into AC, e.g. with choppers |
| 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 | 4 |
| 2017 | 2 |
| 2018 | 5 |
| 2019 | 12 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 6 |
| 2023 | 7 |
| 2024 | 10 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Test device
US-12517175-B2 · Jan 6, 2026 · US
Absence of voltage detector
US-12416651-B2 · Sep 16, 2025 · US
Current sensing circuitry
US-2025147081-A1 · May 8, 2025 · US
Current sensing apparatus
US-12287358-B2 · Apr 29, 2025 · US
Calibration for routing resistance induced error
US-2024310432-A1 · Sep 19, 2024 · US
Absence of voltage detector
US-2024302414-A1 · Sep 12, 2024 · US
Estimation system
US-2024280637-A1 · Aug 22, 2024 · US
Absence of voltage detector
US-11988693-B2 · May 21, 2024 · US
Test device
US-2024159830-A1 · May 16, 2024 · US
Amplifier circuitry and current sensor having the same
US-11979120-B2 · May 7, 2024 · US
Current measuring device for switched-mode power converters and regulation circuit for application of the current measuring device
US-11971433-B2 · Apr 30, 2024 · US
Current sensor
US-2024125823-A1 · Apr 18, 2024 · US
Current sensing apparatus
US-2024094267-A1 · Mar 21, 2024 · US
Signal detection circuit
US-11874307-B2 · Jan 16, 2024 · US
Apparatus and method for diagnosing phase current sensor failure of 3-phase inverter
US-2023408563-A1 · Dec 21, 2023 · US
On-chip oscilloscope
US-11835551-B2 · Dec 5, 2023 · US
Current detecting circuit, current detecting method and converter
US-11808789-B2 · Nov 7, 2023 · US
Systems and methods for detecting currents of power management systems
US-2023126379-A1 · Apr 27, 2023 · US
On-chip oscilloscope
US-2023122803-A1 · Apr 20, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01R19/18?
- CPC G01R19/18 is the Cooperative Patent Classification code for “using conversion of DC into AC, e.g. with choppers.”
- How many patents are filed under CPC G01R19/18 (using conversion of DC into AC, e.g. with choppers)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC G01R19/18 growing?
- Publication counts under this code: 10 in 2024 vs 3 in 2025 (latest complete years).