Rotating electric machine
US-2019393760-A1 · Dec 26, 2019 · US
wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K9/18 |
| Official title | wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing |
| Display label | wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing |
| Total patents | 191 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 8 |
| 2016 | 6 |
| 2017 | 14 |
| 2018 | 10 |
| 2019 | 26 |
| 2020 | 29 |
| 2021 | 24 |
| 2022 | 18 |
| 2023 | 18 |
| 2024 | 19 |
| 2025 | 16 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Drive device
US-2019393753-A1 · Dec 26, 2019 · US
Motor drive system and method
US-2019393816-A1 · Dec 26, 2019 · US
Motor drive system including removable bypass circuit and/or cooling features
US-2019393762-A1 · Dec 26, 2019 · US
Closed rotary electric machine comprising an internal cooling system
US-2019386537-A1 · Dec 19, 2019 · US
Stator assembly for an electric generator with accommodation space
US-10491075-B2 · Nov 26, 2019 · US
Rotary electric machine
US-2019348882-A1 · Nov 14, 2019 · US
Closed rotating electrical machine comprising an internal air cooling system of the magnets in the rotor
US-2019334409-A1 · Oct 31, 2019 · US
Motor and electric power steering device
US-2019313549-A1 · Oct 10, 2019 · US
Generator for a wind turbine
US-2019277264-A1 · Sep 12, 2019 · US
Rotary electric machine having gas coolers
US-10404138-B2 · Sep 3, 2019 · US
Electric machine with air channels
US-10374487-B2 · Aug 6, 2019 · US
Electric vehicle
US-2019225076-A1 · Jul 25, 2019 · US
Electric machine
US-10298087-B2 · May 21, 2019 · US
Operating a wind turbine generator cooling system
US-2019140518-A1 · May 9, 2019 · US
Method for producing a corona shield, fast-curing corona shield system, and electric machine
US-2019131842-A1 · May 2, 2019 · US
Rotating Electrical Machine, Compressor System, and Pump System
US-2019109514-A1 · Apr 11, 2019 · US
Heat exchanger for an electrical machine
US-2019101105-A1 · Apr 4, 2019 · US
Electric machine comprising a stator provided with an inner tubular sleeve
US-2019089211-A1 · Mar 21, 2019 · US
Rotor and generator including the same
US-2019074743-A1 · Mar 7, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K9/18?
- CPC H02K9/18 is the Cooperative Patent Classification code for “wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing.”
- How many patents are filed under CPC H02K9/18 (wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing)?
- Our database includes 191 publications tagged with this CPC code.
- Is patent activity under CPC H02K9/18 growing?
- Publication counts under this code: 19 in 2024 vs 16 in 2025 (latest complete years).