Surge recovery system and methods
US-12460584-B2 · Nov 4, 2025 · US
with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence)
with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence) · 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 | F04D19/026 |
| Official title | {with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence)} |
| Display label | with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence) |
| Total patents | 46 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 8 |
| 2017 | 2 |
| 2018 | 3 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Flow control device for axial flow turbomachines in series
US-12421858-B1 · Sep 23, 2025 · US
Arrangement for pressurizing of fluid
US-12338828-B2 · Jun 24, 2025 · US
Compressor with counter-rotating blade rows
US-12196129-B2 · Jan 14, 2025 · US
Arrangement for pressurizing of fluid
US-2024337264-A1 · Oct 10, 2024 · US
Surge recovery system and methods
US-2024301834-A1 · Sep 12, 2024 · US
Arrangement for pressurizing of fluid
US-12049900-B2 · Jul 30, 2024 · US
Fused soft and hard bearing rings
US-12025182-B2 · Jul 2, 2024 · US
Surge recovery system and methods
US-12000345-B2 · Jun 4, 2024 · US
Flow control device for axial flow turbomachines in series
US-11946392-B1 · Apr 2, 2024 · US
Modular multistage turbine system for gas turbine engines
US-11879386-B2 · Jan 23, 2024 · US
Modular multistage turbine system for gas turbine engines
US-2023287834-A1 · Sep 14, 2023 · US
Embedded electric motor assembly
US-11739694-B2 · Aug 29, 2023 · US
Arrangement for pressurizing of fluid
US-2023235740-A1 · Jul 27, 2023 · US
Arrangement for pressurizing of fluid
US-11639723-B2 · May 2, 2023 · US
Fused soft and hard bearing rings
US-2023117756-A1 · Apr 20, 2023 · US
Flow control device for axial flow turbomachines in series
US-11585227-B1 · Feb 21, 2023 · US
Compressor with counter-rotating blade rows
US-2022389862-A1 · Dec 8, 2022 · US
Surge recovery system and methods
US-2022349354-A1 · Nov 3, 2022 · US
Surge recovery systems and methods
US-11448138-B2 · Sep 20, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D19/026?
- CPC F04D19/026 is the Cooperative Patent Classification code for “with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence).”
- How many patents are filed under CPC F04D19/026 (with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence))?
- Our database includes 46 publications tagged with this CPC code.
- Is patent activity under CPC F04D19/026 growing?
- Publication counts under this code: 7 in 2024 vs 4 in 2025 (latest complete years).