Airflow generator power supply and wind turbine generator
US-2016377060-A1 · Dec 29, 2016 · US
using discharge tubes or semiconductor devices to convert the intermediate DC into AC
using discharge tubes or semiconductor devices to convert the intermediate DC into AC · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02M5/44 |
| Official title | using discharge tubes or semiconductor devices to convert the intermediate DC into AC |
| Display label | using discharge tubes or semiconductor devices to convert the intermediate DC into AC |
| Total patents | 231 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 37 |
| 2016 | 29 |
| 2017 | 25 |
| 2018 | 26 |
| 2019 | 20 |
| 2020 | 24 |
| 2021 | 24 |
| 2022 | 17 |
| 2023 | 10 |
| 2024 | 13 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Motor driving device and air conditioner including the same
US-9502996-B2 · Nov 22, 2016 · US
Method of controlling direct power converter
US-9490722-B2 · Nov 8, 2016 · US
A control apparatus for a power converter
US-2016308453-A1 · Oct 20, 2016 · US
HVDC series current source converter
US-9461555-B2 · Oct 4, 2016 · US
Power transmission network
US-2016276948-A1 · Sep 22, 2016 · US
Direct power conversion device and method for controlling direct power conversion device
US-9450502-B2 · Sep 20, 2016 · US
Submodule for modular multi-level converter and application thereof
US-2016268915-A1 · Sep 15, 2016 · US
Inverter system
US-2016268948-A1 · Sep 15, 2016 · US
Motor control device having protective unit of charging resistor
US-9444373-B2 · Sep 13, 2016 · US
Control method for direct power converter
US-2016248335-A1 · Aug 25, 2016 · US
Power converter
US-2016248365-A1 · Aug 25, 2016 · US
Method for correcting electric power loss in an hvdc system
US-2016233780-A1 · Aug 11, 2016 · US
Power converting circuit
US-9407168-B2 · Aug 2, 2016 · US
Hvdc series current source converter
US-2016211761-A1 · Jul 21, 2016 · US
Electromagnetic compatibility filter
US-2016164448-A1 · Jun 9, 2016 · US
Insulation design apparatus of high voltage direct current transmission system
US-2016149508-A1 · May 26, 2016 · US
System and method for unified common mode voltage injection
US-2016149507-A1 · May 26, 2016 · US
Optimized filter for battery energy storage on alternate energy systems
US-9337685-B2 · May 10, 2016 · US
Position sensorless open loop control for motor drives with output filter and transformer
US-9312779-B2 · Apr 12, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02M5/44?
- CPC H02M5/44 is the Cooperative Patent Classification code for “using discharge tubes or semiconductor devices to convert the intermediate DC into AC.”
- How many patents are filed under CPC H02M5/44 (using discharge tubes or semiconductor devices to convert the intermediate DC into AC)?
- Our database includes 231 publications tagged with this CPC code.
- Is patent activity under CPC H02M5/44 growing?
- Publication counts under this code: 13 in 2024 vs 6 in 2025 (latest complete years).