Power supply apparatus and image forming apparatus
US-10483752-B2 · Nov 19, 2019 · US
for transformers
for transformers · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02H7/04 |
| Official title | for transformers |
| Display label | for transformers |
| Total patents | 196 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 17 |
| 2016 | 13 |
| 2017 | 16 |
| 2018 | 10 |
| 2019 | 18 |
| 2020 | 16 |
| 2021 | 18 |
| 2022 | 32 |
| 2023 | 28 |
| 2024 | 15 |
| 2025 | 11 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Voltage differential transducer (vdt) fault detection
US-2019305542-A1 · Oct 3, 2019 · US
Testing device, testing method, and program for power system protection control system
US-10317452-B2 · Jun 11, 2019 · US
Power-network note, variable transformer and method of operating the node
US-10211627-B2 · Feb 19, 2019 · US
Subsea power distribution device and system
US-10164430-B2 · Dec 25, 2018 · US
Methods and apparatus for soft operation of transformers using auxiliary winding excitation
US-10135372-B2 · Nov 20, 2018 · US
Improvements in or relating to the protection of power transformers
US-2018294640-A1 · Oct 11, 2018 · US
Network protector control for spot network fed from feeder sources having voltage differences
US-10096991-B2 · Oct 9, 2018 · US
Systems and methods for detecting turn-to-turn faults in windings
US-10088516-B2 · Oct 2, 2018 · US
Residual current detecting (rcd) and ground impedance monitoring transformer and control methods
US-2018224488-A1 · Aug 9, 2018 · US
Residual current detecting (RCD) and ground impedance monitoring transformer and control methods
US-9964574-B2 · May 8, 2018 · US
Transformer protection system
US-9935454-B2 · Apr 3, 2018 · US
Device and method for determining a parameter of a transformer
US-2018024180-A1 · Jan 25, 2018 · US
A method for controlled energising of a transformer
US-2018012711-A1 · Jan 11, 2018 · US
Phase control device
US-2017373486-A1 · Dec 28, 2017 · US
Active engine cool down time delay for automatic transfer switch controllers
US-9853494-B2 · Dec 26, 2017 · US
Insulating cover for transformer brackets
US-9847633-B2 · Dec 19, 2017 · US
Network protector control for spot network fed from feeder sources having voltage differences
US-2017358919-A1 · Dec 14, 2017 · US
Residual current detecting (rcd) and ground impedance monitoring transformer and control methods
US-2017350927-A1 · Dec 7, 2017 · US
System and method for magnetizing a transformer in an electrical system prior to energizing the electrical system
US-2017338760-A1 · Nov 23, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02H7/04?
- CPC H02H7/04 is the Cooperative Patent Classification code for “for transformers.”
- How many patents are filed under CPC H02H7/04 (for transformers)?
- Our database includes 196 publications tagged with this CPC code.
- Is patent activity under CPC H02H7/04 growing?
- Publication counts under this code: 15 in 2024 vs 11 in 2025 (latest complete years).