Linear solid-state lighting with a pulse amplitude control scheme
US-10139093-B2 · Nov 27, 2018 · US
Circuit arrangements for protecting against earth faults
Circuit arrangements for protecting against earth faults · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H05B47/26 |
| Official title | Circuit arrangements for protecting against earth faults |
| Display label | Circuit arrangements for protecting against earth faults |
| Total patents | 169 |
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 | 9 |
| 2016 | 16 |
| 2017 | 22 |
| 2018 | 17 |
| 2019 | 24 |
| 2020 | 12 |
| 2021 | 17 |
| 2022 | 21 |
| 2023 | 15 |
| 2024 | 12 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vehicular lamp
US-2018334085-A1 · Nov 22, 2018 · US
Detection circuit and led tube including the same
US-2018324925-A1 · Nov 8, 2018 · US
Led double-capped lamp, for operation on an electronic ballast for a low-pressure discharge lamp, especially a fluorescent lamp, and method for operating such a lamp
US-2018279430-A1 · Sep 27, 2018 · US
Led tube lamp and power supply module applicable thereto
US-2018259135-A1 · Sep 13, 2018 · US
Linear Solid-State Lighting With A Pulse Amplitude Control Scheme
US-2018238531-A1 · Aug 23, 2018 · US
Output circuit
US-10034347-B2 · Jul 24, 2018 · US
Electrical wiring device having a bidirectional light pipe for use in an ambient environment
US-9999112-B2 · Jun 12, 2018 · US
Eye-protection lamp and light intensity adjusting method thereof
US-9986620-B2 · May 29, 2018 · US
Linear solid-state lighting with electric shock prevention
US-9986619-B2 · May 29, 2018 · US
LED tube lamp and power supply module applicable thereto
US-9970602-B2 · May 15, 2018 · US
Portable power and signal distribution system for a controllable system including multiple devices
US-9961743-B2 · May 1, 2018 · US
Led tube lamp
US-2018100644-A1 · Apr 12, 2018 · US
Ground fault detection circuit, abnormality detection circuit, light emitting device, vehicle
US-9853439-B2 · Dec 26, 2017 · US
Electrical Wiring Device Having A Bidirectional Light Pipe For Use in an Ambient Enviroment
US-2017359882-A1 · Dec 14, 2017 · US
LED tube lamp
US-9841174-B2 · Dec 12, 2017 · US
Output circuit
US-2017354015-A1 · Dec 7, 2017 · US
Ballast stabilizer-compatible lamp having leakage current protection circuit
US-9839081-B2 · Dec 5, 2017 · US
Ground fault detection circuit, abnormality detection circuit, light emitting device, vehicle
US-2017331272-A1 · Nov 16, 2017 · US
Output circuit
US-9820352-B2 · Nov 14, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H05B47/26?
- CPC H05B47/26 is the Cooperative Patent Classification code for “Circuit arrangements for protecting against earth faults.”
- How many patents are filed under CPC H05B47/26 (Circuit arrangements for protecting against earth faults)?
- Our database includes 169 publications tagged with this CPC code.
- Is patent activity under CPC H05B47/26 growing?
- Publication counts under this code: 12 in 2024 vs 4 in 2025 (latest complete years).