Equipment enclosure with self-sealing multilayer wall structure
US-2020403399-A1 · Dec 24, 2020 · US
Limitation or suppression of earth fault currents, e.g. Petersen coil
Limitation or suppression of earth fault currents, e.g. Petersen coil · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02H9/08 |
| Official title | Limitation or suppression of earth fault currents, e.g. Petersen coil |
| Display label | Limitation or suppression of earth fault currents, e.g. Petersen coil |
| Total patents | 138 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 12 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 13 |
| 2020 | 13 |
| 2021 | 14 |
| 2022 | 17 |
| 2023 | 15 |
| 2024 | 10 |
| 2025 | 13 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Robust inverter topology
US-10848053-B2 · Nov 24, 2020 · US
Ground fault minimization
US-2020343716-A1 · Oct 29, 2020 · US
Ground fault minimization
US-10756532-B2 · Aug 25, 2020 · US
Method for Identifying an Outgoing Circuit Having an Earth Fault in a Three-Phase Power Supply System
US-2020191844-A1 · Jun 18, 2020 · US
Electric leakage protection electronic rectifier and lamp with electric leakage protection electronic rectifier
US-10645784-B1 · May 5, 2020 · US
Bipolar DC power transmission scheme
US-10615587-B2 · Apr 7, 2020 · US
Power distribution systems
US-10530152-B2 · Jan 7, 2020 · US
Electronic apparatus and control method thereof
US-2019393698-A1 · Dec 26, 2019 · US
Method and control system for zero-sequence current compensation for ground current reduction
US-2019319530-A1 · Oct 17, 2019 · US
Converter arrangement having a star point reactor
US-10425015-B2 · Sep 24, 2019 · US
Monitor device, ground fault protection circuit and techniques
US-2019288502-A1 · Sep 19, 2019 · US
Monitor device, ground fault protection circuit and techniques
US-2019288499-A1 · Sep 19, 2019 · US
Grounding circuit and grounding method
US-10404382-B2 · Sep 3, 2019 · US
Apparatus and method for the production of foods
US-2019248519-A1 · Aug 15, 2019 · US
Parameter tuning approach for bypass damping filter to suppress subsynchronous resonance in power systems
US-10374427-B2 · Aug 6, 2019 · US
Device to reduce residual current
US-10361555-B2 · Jul 23, 2019 · US
Converter Arrangement Having A Star Point Reactor
US-2019165692-A1 · May 30, 2019 · US
Anti-short-circuit integrated chip and terminal facility
US-10305277-B1 · May 28, 2019 · US
Device and method for protecting against leakage currents
US-10224711-B2 · Mar 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02H9/08?
- CPC H02H9/08 is the Cooperative Patent Classification code for “Limitation or suppression of earth fault currents, e.g. Petersen coil.”
- How many patents are filed under CPC H02H9/08 (Limitation or suppression of earth fault currents, e.g. Petersen coil)?
- Our database includes 138 publications tagged with this CPC code.
- Is patent activity under CPC H02H9/08 growing?
- Publication counts under this code: 10 in 2024 vs 13 in 2025 (latest complete years).