Shaft ground ring
US-2026100624-A1 · Apr 9, 2026 · US
Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing
Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01R39/46 |
| Official title | Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing |
| Display label | Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing |
| Total patents | 38 |
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 | 3 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 7 |
| 2019 | 5 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Slip ring apparatus, yaw system, and wind turbine generator set
US-12431680-B2 · Sep 30, 2025 · US
Electric motor end cap having dust passage
US-2025023416-A1 · Jan 16, 2025 · US
Slip ring apparatus, yaw system, and wind turbine generator set
US-2024072503-A1 · Feb 29, 2024 · US
Reduction of shaft voltage
US-11863027-B2 · Jan 2, 2024 · US
Electrical contact device and rotating electric machine including the electrical contact device
US-11670901-B2 · Jun 6, 2023 · US
Reduction Of Shaft Voltage
US-2023106225-A1 · Apr 6, 2023 · US
Electric motor having a commutator and brush for the electric motor
US-2022158397-A1 · May 19, 2022 · US
Assembly for electrically exciting the rotor of an electrical machine, and method for operation
US-11336157-B2 · May 17, 2022 · US
Motor
US-11228230-B2 · Jan 18, 2022 · US
Assembly for electrically exciting the rotor of an electrical machine, and method for operation
US-2021367487-A1 · Nov 25, 2021 · US
Motor
US-11128203-B2 · Sep 21, 2021 · US
Motor
US-2021242754-A1 · Aug 5, 2021 · US
Rotor and motor
US-2021218320-A1 · Jul 15, 2021 · US
Superconducting devices, such as slip-rings and homopolar motors/generators
US-10965077-B2 · Mar 30, 2021 · US
Superconducting devices, such as slip-rings and homopolar motors/generators
US-2020144778-A1 · May 7, 2020 · US
Electrical contact device and rotating electric machine including the electrical contact device
US-2020127427-A1 · Apr 23, 2020 · US
Electrical connector for a wind turbine
US-10519937-B2 · Dec 31, 2019 · US
Hydroplaning reducing slip ring apparatus
US-10446996-B2 · Oct 15, 2019 · US
Superconducting devices, such as slip-rings and homopolar motors/generators
US-10446995-B2 · Oct 15, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01R39/46?
- CPC H01R39/46 is the Cooperative Patent Classification code for “Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing.”
- How many patents are filed under CPC H01R39/46 (Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing)?
- Our database includes 38 publications tagged with this CPC code.
- Is patent activity under CPC H01R39/46 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).