Surgical instrument with phase change cooling
US-10804769-B2 · Oct 13, 2020 · US
Heat pipes
Heat pipes · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K9/225 |
| Official title | {Heat pipes} |
| Display label | Heat pipes |
| Total patents | 192 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 9 |
| 2017 | 10 |
| 2018 | 10 |
| 2019 | 17 |
| 2020 | 21 |
| 2021 | 22 |
| 2022 | 19 |
| 2023 | 25 |
| 2024 | 21 |
| 2025 | 23 |
| 2026 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Work device
US-2020303995-A1 · Sep 24, 2020 · US
High thermal conductivity stator component for vehicle motor based on 3D phase change heat pipe technology
US-10734867-B2 · Aug 4, 2020 · US
Air-cooled electric motor with an enclosed housing
US-2020244139-A1 · Jul 30, 2020 · US
Electric motor system
US-2020091798-A1 · Mar 19, 2020 · US
Axial gap rotary electric machine
US-10566876-B2 · Feb 18, 2020 · US
Method and assembly of a power generation system
US-10566877-B2 · Feb 18, 2020 · US
Conformal heat pipe assemblies
US-2019350111-A1 · Nov 14, 2019 · US
Rotary machine
US-10476365-B2 · Nov 12, 2019 · US
High thermal conductivity stator component for vehicle motor based on 3d phase change heat pipe technology
US-2019326797-A1 · Oct 24, 2019 · US
Electrical winding topologies and methods of making the same
US-2019305646-A1 · Oct 3, 2019 · US
Heat pipe, rotor, and rotary electric machine
US-2019280565-A1 · Sep 12, 2019 · US
Cooling arrangement and method for power tool
US-2019252945-A1 · Aug 15, 2019 · US
Automotive rotary electric machine
US-2019229584-A1 · Jul 25, 2019 · US
Squirrel cage rotor for an asynchronous machine
US-2019190338-A1 · Jun 20, 2019 · US
Method and assembly of a power generation system
US-2019149018-A1 · May 16, 2019 · US
System for thermal management in electrical machines
US-10277096-B2 · Apr 30, 2019 · US
Electric machine
US-10250105-B2 · Apr 2, 2019 · US
Electric power tool
US-2019077004-A1 · Mar 14, 2019 · US
Cooling assembly for electrical machines and methods of assembling the same
US-10224799-B2 · Mar 5, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K9/225?
- CPC H02K9/225 is the Cooperative Patent Classification code for “Heat pipes.”
- How many patents are filed under CPC H02K9/225 (Heat pipes)?
- Our database includes 192 publications tagged with this CPC code.
- Is patent activity under CPC H02K9/225 growing?
- Publication counts under this code: 21 in 2024 vs 23 in 2025 (latest complete years).