Fan drive gear system including a two-piece fan shaft with lubricant transfer leakage recapture
US-10161409-B2 · Dec 25, 2018 · US
the driving means being a planetary gear
the driving means being a planetary gear · 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 | F04D25/028 |
| Official title | {the driving means being a planetary gear} |
| Display label | the driving means being a planetary gear |
| Total patents | 167 |
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 | 24 |
| 2017 | 17 |
| 2018 | 15 |
| 2019 | 15 |
| 2020 | 21 |
| 2021 | 17 |
| 2022 | 16 |
| 2023 | 14 |
| 2024 | 9 |
| 2025 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Rotary machine
US-10145378-B2 · Dec 4, 2018 · US
Compressor tip injector
US-10145387-B2 · Dec 4, 2018 · US
Aircraft engine with a compressor device
US-10119548-B2 · Nov 6, 2018 · US
Centrifugal compressor
US-2018283388-A1 · Oct 4, 2018 · US
Centrifugal compressor
US-2018283393-A1 · Oct 4, 2018 · US
Intake Air Boost System For Two-Cycle Engine Having Roots Blowers
US-2018252153-A1 · Sep 6, 2018 · US
Engine supercharger
US-10012140-B2 · Jul 3, 2018 · US
Gas turbine engine with high speed low pressure turbine section and bearing support features
US-2018073392-A1 · Mar 15, 2018 · US
Compressor and turbo chiller
US-9897092-B2 · Feb 20, 2018 · US
Subsea pressure booster
US-2018023573-A1 · Jan 25, 2018 · US
Subsea pressure booster
US-9841026-B2 · Dec 12, 2017 · US
Gas turbine engine with high speed low pressure turbine section and bearing support features
US-9835052-B2 · Dec 5, 2017 · US
Gas turbine engine with high speed low pressure turbine section and bearing support features
US-2017298767-A1 · Oct 19, 2017 · US
Electric propulsion engine for an aircraft
US-2017292523-A1 · Oct 12, 2017 · US
Speed increaser
US-2017284518-A1 · Oct 5, 2017 · US
Electromagnetic anti-windmilling system
US-2017284302-A1 · Oct 5, 2017 · US
Supply of air to an air-conditioning circuit of an aircraft cabin
US-2017284408-A1 · Oct 5, 2017 · US
Speed increaser and centrifugal compressor
US-2017276144-A1 · Sep 28, 2017 · US
Impeller for supercharger
US-2017268527-A1 · Sep 21, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F04D25/028?
- CPC F04D25/028 is the Cooperative Patent Classification code for “the driving means being a planetary gear.”
- How many patents are filed under CPC F04D25/028 (the driving means being a planetary gear)?
- Our database includes 167 publications tagged with this CPC code.
- Is patent activity under CPC F04D25/028 growing?
- Publication counts under this code: 9 in 2024 vs 11 in 2025 (latest complete years).