Motor and cleaner comprising the same
US-12587077-B2 · Mar 24, 2026 · US
Radial air gap machines
Radial air gap machines · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K21/024 |
| Official title | {Radial air gap machines} |
| Display label | Radial air gap machines |
| Total patents | 60 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 2 |
| 2018 | 11 |
| 2019 | 4 |
| 2020 | 7 |
| 2021 | 4 |
| 2022 | 6 |
| 2023 | 4 |
| 2024 | 11 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vehicle driving apparatus
US-12545232-B2 · Feb 10, 2026 · US
Drive system of a washing machine
US-12451779-B2 · Oct 21, 2025 · US
Electric machine with axially displaceable rotor
US-12424915-B2 · Sep 23, 2025 · US
Electrical radial flow machine and powertrain
US-12362639-B2 · Jul 15, 2025 · US
Rotary electric machine
US-2024396416-A1 · Nov 28, 2024 · US
Control system
US-2024305179-A1 · Sep 12, 2024 · US
Permanent magnet motor topological construction method based on working magnetic field harmonic orientation and motor
US-12068646-B2 · Aug 20, 2024 · US
Electromagnetic rotary drive, a centrifugal pump and a pump unit
US-12062956-B2 · Aug 13, 2024 · US
Drive system of a washing machine
US-2024235350-A9 · Jul 11, 2024 · US
Vehicle driving apparatus
US-2024199000-A1 · Jun 20, 2024 · US
Permanent magnet generator systems
US-12009702-B2 · Jun 11, 2024 · US
Vernier permanent magnet motor with stator having coded auxiliary teeth
US-11990793-B2 · May 21, 2024 · US
Electric machine with axially displaceable rotor
US-2024146166-A1 · May 2, 2024 · US
Drive system of a washing machine
US-2024136901-A1 · Apr 25, 2024 · US
Turbomachine equipped with an embedded electric machine having a segmented and movable stator
US-11894738-B2 · Feb 6, 2024 · US
Permanent magnet generator systems
US-2023421008-A1 · Dec 28, 2023 · US
Motor and cleaner comprising the same
US-2023344325-A1 · Oct 26, 2023 · US
Vernier permanent magnet motor with stator having coded auxiliary teeth
US-2023336039-A1 · Oct 19, 2023 · US
Electrical radial flow machine and powertrain
US-2023216388-A1 · Jul 6, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K21/024?
- CPC H02K21/024 is the Cooperative Patent Classification code for “Radial air gap machines.”
- How many patents are filed under CPC H02K21/024 (Radial air gap machines)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC H02K21/024 growing?
- Publication counts under this code: 11 in 2024 vs 3 in 2025 (latest complete years).