Rotating electrical machine
US-11146138-B2 · Oct 12, 2021 · US
with variable-reluctance soft-iron rotors without winding
with variable-reluctance soft-iron rotors without winding · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K19/24 |
| Official title | with variable-reluctance soft-iron rotors without winding |
| Display label | with variable-reluctance soft-iron rotors without winding |
| Total patents | 77 |
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 | 4 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 18 |
| 2020 | 12 |
| 2021 | 10 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotational electric machine
US-11133732-B2 · Sep 28, 2021 · US
Rotational electric machine
US-11050331-B2 · Jun 29, 2021 · US
Rotary electric machine having magnetic flux supplied from a field coil
US-10923970-B2 · Feb 16, 2021 · US
Rotary electric machine having magnetic flux supplied from a field coil
US-10840786-B2 · Nov 17, 2020 · US
Rotating electrical machine apparatus
US-10840769-B2 · Nov 17, 2020 · US
Method for Designing a Stator Segment for a Stator of a Synchronous Reluctance Machine and Corresponding Stator and Corresponding Reluctance Machine
US-2020358328-A1 · Nov 12, 2020 · US
Electrodynamic converter
US-10756608-B2 · Aug 25, 2020 · US
Dual magnetic phase material rings for AC electric machines
US-10749385-B2 · Aug 18, 2020 · US
Rotary electric machine
US-10742079-B2 · Aug 11, 2020 · US
Electromechanical system
US-2020227956-A1 · Jul 16, 2020 · US
Voltage generator and a method of making a voltage generator
US-10707741-B2 · Jul 7, 2020 · US
Rotary electric machine
US-2020161952-A1 · May 21, 2020 · US
Synchronous reluctance type rotary electric machine
US-10637310-B2 · Apr 28, 2020 · US
Synchronous reluctance type rotary electric machine
US-10622853-B2 · Apr 14, 2020 · US
Rotating electrical machine apparatus
US-2020031446-A1 · Jan 30, 2020 · US
Rotary electric machine
US-2019372407-A1 · Dec 5, 2019 · US
Rotary electric machine
US-2019372443-A1 · Dec 5, 2019 · US
Rotating electrical machine apparatus
US-10486784-B2 · Nov 26, 2019 · US
Rotational electric machine
US-2019334423-A1 · Oct 31, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K19/24?
- CPC H02K19/24 is the Cooperative Patent Classification code for “with variable-reluctance soft-iron rotors without winding.”
- How many patents are filed under CPC H02K19/24 (with variable-reluctance soft-iron rotors without winding)?
- Our database includes 77 publications tagged with this CPC code.
- Is patent activity under CPC H02K19/24 growing?
- Publication counts under this code: 3 in 2024 vs 4 in 2025 (latest complete years).