Defect detection in high voltage power supply apparatus
US-2021356498-A1 · Nov 18, 2021 · US
Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G01R1/28 |
| Official title | Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform |
| Display label | Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform |
| Total patents | 150 |
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 | 1 |
| 2017 | 2 |
| 2018 | 7 |
| 2019 | 16 |
| 2020 | 19 |
| 2021 | 22 |
| 2022 | 18 |
| 2023 | 12 |
| 2024 | 20 |
| 2025 | 26 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Magnetic field measuring device and method for detecting a localization current in a branched AC power supply system
US-11169198-B2 · Nov 9, 2021 · US
Frequency regulation method and apparatus
US-11150284-B2 · Oct 19, 2021 · US
Method and system for determining and/or adjusting phases of at least two electrical signals
US-2021143918-A1 · May 13, 2021 · US
Power meter with fixed segment interactive menu
US-10989745-B2 · Apr 27, 2021 · US
Method and apparatus for monitoring secondary power device, and electronic system including the apparatus
US-2021116529-A1 · Apr 22, 2021 · US
Test system, transmitter, and receiver capable of executing multiple tests based on DC coupling configuration
US-2021116515-A1 · Apr 22, 2021 · US
Inrush current test device
US-10983149-B2 · Apr 20, 2021 · US
Method and system for emulating an electromagnetic environment in an anechoic chamber
US-2021096165-A1 · Apr 1, 2021 · US
Self-calibrating deskew fixture
US-2021063475-A1 · Mar 4, 2021 · US
Pulsed high current technique for characterization of device under test
US-2021067147-A1 · Mar 4, 2021 · US
Method and apparatus for monitoring secondary power device, and electronic system including the apparatus
US-10908249-B2 · Feb 2, 2021 · US
Apparatus and method for de-embedding a combiner from a balanced signal
US-10895588-B1 · Jan 19, 2021 · US
Method and testing device for testing wiring of transformers
US-10859612-B2 · Dec 8, 2020 · US
Apparatuses and methods involving self-testing voltage regulation circuits
US-10823787-B2 · Nov 3, 2020 · US
Generator waveform measurement
US-10823772-B2 · Nov 3, 2020 · US
Calibrating a power meter with a current transformer in the field
US-2020292652-A1 · Sep 17, 2020 · US
Power meter with fixed segment interactive menu
US-2020292598-A1 · Sep 17, 2020 · US
System and method of creating periodic pulse sequences with defined absolute phase
US-10778201-B1 · Sep 15, 2020 · US
Wearable device and data security method thereof
US-10762215-B2 · Sep 1, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G01R1/28?
- CPC G01R1/28 is the Cooperative Patent Classification code for “Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform.”
- How many patents are filed under CPC G01R1/28 (Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform)?
- Our database includes 150 publications tagged with this CPC code.
- Is patent activity under CPC G01R1/28 growing?
- Publication counts under this code: 20 in 2024 vs 26 in 2025 (latest complete years).