Power supply system, article of personal protective equipment, and method of improving power efficiency of power supply system
US-2025239942-A1 · Jul 24, 2025 · US
using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate AC
using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate 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 | H02M3/26 |
| Official title | using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate AC |
| Display label | using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate AC |
| Total patents | 27 |
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 | 2 |
| 2016 | 3 |
| 2017 | 6 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Isolated converter with high boost ratio
US-11652420-B2 · May 16, 2023 · US
Symmetric split transformer for emi reduction
US-2022165476-A1 · May 26, 2022 · US
Isolated converter with high boost ratio
US-2021336548-A1 · Oct 28, 2021 · US
Isolated converter with high boost ratio
US-11088629-B2 · Aug 10, 2021 · US
Isolated boost converter
US-11081968-B2 · Aug 3, 2021 · US
Isolated boost converter
US-2020395861-A1 · Dec 17, 2020 · US
Isolated converter with high boost ratio
US-2020395860-A1 · Dec 17, 2020 · US
Low quiescent current load switch
US-10868521-B2 · Dec 15, 2020 · US
Low quiescent current load switch
US-2019372558-A1 · Dec 5, 2019 · US
Low quiescent current load switch
US-10432175-B2 · Oct 1, 2019 · US
Low quiescent current load switch
US-2019214973-A1 · Jul 11, 2019 · US
Resonant converter having a transformer with central point tap
US-10199941-B2 · Feb 5, 2019 · US
Dimmer switch and dimmer switch system with secondary switch
US-10123391-B1 · Nov 6, 2018 · US
Power supply unit and calibration method to improve reliability
US-9923479-B2 · Mar 20, 2018 · US
Resonant converter having a transformer with central point tap
US-2018034371-A1 · Feb 1, 2018 · US
Power supply and calibration method
US-2017353121-A1 · Dec 7, 2017 · US
Power conversion device
US-9837908-B2 · Dec 5, 2017 · US
Power conversion device
US-2017324337-A1 · Nov 9, 2017 · US
Dual mode DC-DC converter
US-9627979-B2 · Apr 18, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02M3/26?
- CPC H02M3/26 is the Cooperative Patent Classification code for “using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate AC.”
- How many patents are filed under CPC H02M3/26 (using discharge tubes without control electrode or semiconductor devices without control electrode to produce the intermediate AC)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC H02M3/26 growing?
- Publication counts under this code: 1 in 2023 vs 1 in 2025 (latest complete years).