Brush holder apparatus and brush spring having friction enhancing material
US-10158206-B2 · Dec 18, 2018 · US
characterised by the application of pressure to brush
characterised by the application of pressure to brush · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01R39/381 |
| Official title | {characterised by the application of pressure to brush} |
| Display label | characterised by the application of pressure to brush |
| Total patents | 144 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 21 |
| 2016 | 17 |
| 2017 | 11 |
| 2018 | 25 |
| 2019 | 11 |
| 2020 | 15 |
| 2021 | 8 |
| 2022 | 13 |
| 2023 | 9 |
| 2024 | 8 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Slip ring assembly having a brush assembly axially applied to a conductive busbar ring
US-10109970-B1 · Oct 23, 2018 · US
Brush holder apparatus and brush spring having friction enhancing material
US-2018301860-A1 · Oct 18, 2018 · US
Slip ring having multiple brushes axially applied to a segmented busbar
US-10033145-B1 · Jul 24, 2018 · US
Spring post for brush card for a power tool
US-9991770-B2 · Jun 5, 2018 · US
Brush holder assemblies and methods for mounting and replacing brushes
US-2018097324-A1 · Apr 5, 2018 · US
Contact type power feeding apparatus
US-9929526-B2 · Mar 27, 2018 · US
Motor
US-2018069458-A1 · Mar 8, 2018 · US
Slip ring, support mechanism, and plasma processing apparatus
US-2018047547-A1 · Feb 15, 2018 · US
Brush holder assemblies and methods for mounting and replacing brushes
US-9865979-B2 · Jan 9, 2018 · US
Power supply apparatus for field winding motor and field winding motor including the same
US-2018006419-A1 · Jan 4, 2018 · US
Assembly comprising a brush cage and a spiral spring, and corresponding brush-holder, electric motor and motor vehicle starter
US-2017331242-A1 · Nov 16, 2017 · US
Superconducting devices, such as slip-rings and homopolar motors/generators
US-2017250512-A1 · Aug 31, 2017 · US
Propeller deicing brush block
US-9742136-B2 · Aug 22, 2017 · US
Brush assembly for an electric motor
US-9711924-B2 · Jul 18, 2017 · US
Brush holder apparatus, brush assembly, and method
US-2017179665-A1 · Jun 22, 2017 · US
Brush holder device and dc motor equipped with the same
US-2017162993-A1 · Jun 8, 2017 · US
Brush holder apparatus
US-2017162994-A1 · Jun 8, 2017 · US
System and method for monitoring the status of one or more components of an electrical machine
US-9640930-B2 · May 2, 2017 · US
Vibration-reduced brush holder for an electric motor
US-9640929-B2 · May 2, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01R39/381?
- CPC H01R39/381 is the Cooperative Patent Classification code for “characterised by the application of pressure to brush.”
- How many patents are filed under CPC H01R39/381 (characterised by the application of pressure to brush)?
- Our database includes 144 publications tagged with this CPC code.
- Is patent activity under CPC H01R39/381 growing?
- Publication counts under this code: 8 in 2024 vs 5 in 2025 (latest complete years).