Element for compressing a gas and method for controlling such element
US-2024376894-A1 · Nov 14, 2024 · US
Mechanical Engineering
Mechanical Engineering · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F04C28/28 |
| Official title | — |
| Display label | Mechanical Engineering (mapped technology topic) |
| Total patents | 474 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 26 |
| 2016 | 41 |
| 2017 | 44 |
| 2018 | 48 |
| 2019 | 56 |
| 2020 | 44 |
| 2021 | 34 |
| 2022 | 49 |
| 2023 | 43 |
| 2024 | 48 |
| 2025 | 37 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electric compressor and method for controlling same
US-2016370038-A1 · Dec 22, 2016 · US
Variable speed compressor protection system and method
US-9494158-B2 · Nov 15, 2016 · US
Compressor Having Oil-Level Sensing System
US-2016319816-A1 · Nov 3, 2016 · US
Method of optimizing supercharger performance
US-2016319817-A1 · Nov 3, 2016 · US
Motor-driven compressor
US-9482229-B2 · Nov 1, 2016 · US
Compressor protection module
US-9480177-B2 · Oct 25, 2016 · US
Scroll compressor differential pressure control during compressor shutdown transitions
US-9476624-B2 · Oct 25, 2016 · US
Electric compressor
US-9479108-B2 · Oct 25, 2016 · US
Compressors and methods for determining optimal parking positions for compressor pistons
US-9470225-B2 · Oct 18, 2016 · US
Compressor temperature control systems and methods
US-2016298627-A1 · Oct 13, 2016 · US
Suction duct with heat-staked screen
US-9441631-B2 · Sep 13, 2016 · US
Scroll compressor
US-9435337-B2 · Sep 6, 2016 · US
Compressor Assembly With Liquid Sensor
US-2016252092-A1 · Sep 1, 2016 · US
Compressor Assembly With Liquid Sensor
US-2016252093-A1 · Sep 1, 2016 · US
Motor-driven compressor
US-2016245288-A1 · Aug 25, 2016 · US
Motor-drive compressor
US-2016245269-A1 · Aug 25, 2016 · US
Compressor protection module
US-2016222956-A1 · Aug 4, 2016 · US
Compressor Having A Control And Diagnostic Module
US-2016226416-A1 · Aug 4, 2016 · US
System and method for protection of a compressor with an aluminum winding motor
US-9407194-B2 · Aug 2, 2016 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04C28/28?
- CPC F04C28/28 is the Cooperative Patent Classification code for “Mechanical Engineering.”
- How many patents are filed under CPC F04C28/28 (Mechanical Engineering)?
- Our database includes 474 publications tagged with this CPC code.
- Is patent activity under CPC F04C28/28 growing?
- Publication counts under this code: 48 in 2024 vs 37 in 2025 (latest complete years).