Stator for an electric machine, electric machine, stator cooling system, and method for cooling a stator
US-2024223027-A1 · Jul 4, 2024 · US
consisting of hollow conductors
consisting of hollow conductors · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K3/22 |
| Official title | consisting of hollow conductors |
| Display label | consisting of hollow conductors |
| Total patents | 115 |
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 | 6 |
| 2018 | 8 |
| 2019 | 4 |
| 2020 | 15 |
| 2021 | 12 |
| 2022 | 18 |
| 2023 | 15 |
| 2024 | 21 |
| 2025 | 6 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Homopolar linear synchronous machine
US-2022416636-A1 · Dec 29, 2022 · US
Stator Winding With Integrated Cooling
US-2022320933-A1 · Oct 6, 2022 · US
System and method for repairing a generator main lead
US-2022247247-A1 · Aug 4, 2022 · US
Method for repairing solder joint leakages and welding or soldering apparatus for carrying out the method
US-2022166293-A1 · May 26, 2022 · US
Rotary electric machine
US-11309760-B2 · Apr 19, 2022 · US
Rotating electrical machine
US-2022077738-A1 · Mar 10, 2022 · US
Electric machine with phase change material for a turbomachine starter/generator
US-11264854-B2 · Mar 1, 2022 · US
Core, stator, and rotating electric device
US-2022014050-A1 · Jan 13, 2022 · US
Homopolar linear synchronous machine
US-2021408886-A1 · Dec 30, 2021 · US
Thermomagnetic apparatus for electric power generation and method thereof
US-2021399618-A1 · Dec 23, 2021 · US
Homopolar linear synchronous machine utilizing a cold plate
US-11196330-B2 · Dec 7, 2021 · US
Water chamber cover for a water cooling system of an electric machine
US-2021359576-A1 · Nov 18, 2021 · US
Homopolar linear synchronous machine
US-2021336511-A1 · Oct 28, 2021 · US
Stator Having Winding Cooling for an Electrical Machine
US-2021328472-A1 · Oct 21, 2021 · US
Hollow metal part of stator of rotating electrical machine, rotating electrical machine, and manufacturing process of hollow metal part
US-11121591-B2 · Sep 14, 2021 · US
Coated article for an electro-mechanical device
US-2021265888-A1 · Aug 26, 2021 · US
Stranded conductor, coil device, and production method
US-2021249925-A1 · Aug 12, 2021 · US
Wave energy harvester
US-2021203209-A1 · Jul 1, 2021 · US
Insulator and motor include same
US-10923979-B2 · Feb 16, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K3/22?
- CPC H02K3/22 is the Cooperative Patent Classification code for “consisting of hollow conductors.”
- How many patents are filed under CPC H02K3/22 (consisting of hollow conductors)?
- Our database includes 115 publications tagged with this CPC code.
- Is patent activity under CPC H02K3/22 growing?
- Publication counts under this code: 21 in 2024 vs 6 in 2025 (latest complete years).