High load capacity hybrid foil bearing
US-2019368543-A1 · Dec 5, 2019 · US
multi-stage rotors
multi-stage rotors · 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 | F04D29/286 |
| Official title | {multi-stage rotors} |
| Display label | multi-stage rotors |
| Total patents | 186 |
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 | 18 |
| 2017 | 9 |
| 2018 | 20 |
| 2019 | 19 |
| 2020 | 17 |
| 2021 | 21 |
| 2022 | 17 |
| 2023 | 22 |
| 2024 | 11 |
| 2025 | 19 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fluid compressor
US-2019323509-A1 · Oct 24, 2019 · US
Centrifugal blower
US-2019293082-A1 · Sep 26, 2019 · US
Counter-rotating compressor
US-10378551-B2 · Aug 13, 2019 · US
Extracting dry gas from a wet-gas compressor
US-10323656-B2 · Jun 18, 2019 · US
Impeller and rotating machine provided with same
US-10309413-B2 · Jun 4, 2019 · US
Multi-stage centrifugal compressor
US-2018372121-A1 · Dec 27, 2018 · US
Axi-centrifugal compressor
US-2018355791-A1 · Dec 13, 2018 · US
Centrifugal compressor
US-2018347571-A1 · Dec 6, 2018 · US
Geared centrifugal compressor with pressure adjustment portion to balance axial thrust
US-10145381-B2 · Dec 4, 2018 · US
Centrifugal impeller for a turbine engine
US-2018313360-A1 · Nov 1, 2018 · US
Rotor balance adjustment method
US-2018283402-A1 · Oct 4, 2018 · US
Centrifugal rotation machine
US-10087950-B2 · Oct 2, 2018 · US
High stiffness turbomachine impeller, turbomachine including said impeller and method of manufacturing
US-2018266433-A1 · Sep 20, 2018 · US
Multistage centrifugal compressor
US-10077778-B2 · Sep 18, 2018 · US
Lng plant including an axial compressor and a centrifugal compressor
US-2018209427-A1 · Jul 26, 2018 · US
Turbo compressor
US-2018195520-A1 · Jul 12, 2018 · US
A turbomachinery gasket and a turbomachinery provided with said gasket
US-2018149167-A1 · May 31, 2018 · US
A centrifugal conpressor having an inter-stage sealing arrangement
US-2018142694-A1 · May 24, 2018 · US
Centrifugal compressor
US-2018066674-A1 · Mar 8, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D29/286?
- CPC F04D29/286 is the Cooperative Patent Classification code for “multi-stage rotors.”
- How many patents are filed under CPC F04D29/286 (multi-stage rotors)?
- Our database includes 186 publications tagged with this CPC code.
- Is patent activity under CPC F04D29/286 growing?
- Publication counts under this code: 11 in 2024 vs 19 in 2025 (latest complete years).