Passive eddy-current wheel brake with conical form
US-12420917-B2 · Sep 23, 2025 · US
of the eddy-current hysteresis type
of the eddy-current hysteresis type · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K49/04 |
| Official title | of the eddy-current hysteresis type |
| Display label | of the eddy-current hysteresis type |
| Total patents | 53 |
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 | 5 |
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 10 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 9 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Integrated electromagnet and maglev train
US-12358378-B2 · Jul 15, 2025 · US
Eddy-current-based magnetic braking device, vehicle braked wheel and aircraft landing gear equipped with such a wheel
US-2024317389-A1 · Sep 26, 2024 · US
Coupling and control assembly including a position sensor
US-11874142-B2 · Jan 16, 2024 · US
Passive eddy-current wheel brake with conical form
US-2023294822-A1 · Sep 21, 2023 · US
Eddy current deceleration device
US-11764661-B2 · Sep 19, 2023 · US
Axial rotation damping mechanism
US-11753280-B2 · Sep 12, 2023 · US
Eddy current based rotary damper for steer-by-wire feedback actuator
US-11685424-B2 · Jun 27, 2023 · US
Electromagnetically actuable brake device
US-11549562-B2 · Jan 10, 2023 · US
Eddy-current rail brake device
US-11485392-B2 · Nov 1, 2022 · US
Integrated electromagnet and maglev train
US-2022340014-A1 · Oct 27, 2022 · US
Eddy current deceleration device
US-2022320988-A1 · Oct 6, 2022 · US
Apparatus, system and method for braking
US-11318846-B2 · May 3, 2022 · US
Eddy current decelerating apparatus
US-11165326-B2 · Nov 2, 2021 · US
Coupling and Control Assembly Including a Non-Contact, Inductive Displacement Sensor
US-2021302205-A1 · Sep 30, 2021 · US
Eddy-current rail brake device
US-2021269069-A1 · Sep 2, 2021 · US
Axial rotation damping mechanism
US-2021139291-A1 · May 13, 2021 · US
System and method involving a variable speed cooling fan used with a compressor and an internal combustion engine
US-11002175-B2 · May 11, 2021 · US
Electromagnetically actuable brake device
US-2021131512-A1 · May 6, 2021 · US
System and method for a variable speed cooling fan on a skid mounted compressor
US-10927746-B2 · Feb 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K49/04?
- CPC H02K49/04 is the Cooperative Patent Classification code for “of the eddy-current hysteresis type.”
- How many patents are filed under CPC H02K49/04 (of the eddy-current hysteresis type)?
- Our database includes 53 publications tagged with this CPC code.
- Is patent activity under CPC H02K49/04 growing?
- Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).