Speed-changing device
US-12571461-B2 · Mar 10, 2026 · US
both central gears being sun gears
both central gears being sun gears · 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 | F16H3/56 |
| Official title | both central gears being sun gears |
| Display label | both central gears being sun gears |
| Total patents | 43 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 7 |
| 2016 | 2 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 6 |
| 2023 | 3 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Speed-Changing Device
US-2025180102-A1 · Jun 5, 2025 · US
Gear assembly for use in electric drive transmissions
US-11739815-B2 · Aug 29, 2023 · US
Speed-changing device
US-11674576-B2 · Jun 13, 2023 · US
Speed-Changing Device
US-2023147860-A1 · May 11, 2023 · US
Transmission for a Motor Vehicle
US-2022356928-A1 · Nov 10, 2022 · US
Gear Assembly for Use in Electric Drive Transmissions
US-2022325781-A1 · Oct 13, 2022 · US
Powertrain for electric vehicle
US-2022266668-A1 · Aug 25, 2022 · US
Axle assembly having an electric motor module
US-11273700-B2 · Mar 15, 2022 · US
Transmission for an Electric Drive or Drive Train of a Vehicle, Electric Drive and Drive Train
US-2022065334-A1 · Mar 3, 2022 · US
Axle assembly having a gear reduction module with countershaft gear sets
US-11220176-B1 · Jan 11, 2022 · US
Epicyclic gear train and working vehicle having an epicyclic gear train
US-11156268-B2 · Oct 26, 2021 · US
Vehicle drive device with variable transmission
US-2021199180-A1 · Jul 1, 2021 · US
Axle drive unit with a power-shiftable 2-way transmission
US-11015708-B2 · May 25, 2021 · US
Bearingless planetary gearbox
US-10941838-B2 · Mar 9, 2021 · US
Shiftable two-speed transmission suitable for edrive
US-10920858-B2 · Feb 16, 2021 · US
Transmission for vehicle
US-10871205-B2 · Dec 22, 2020 · US
Transmission for vehicle
US-2020309236-A1 · Oct 1, 2020 · US
Axle drive unit with a power-shiftable 2-way transmission
US-2020256465-A1 · Aug 13, 2020 · US
Automatic transmission
US-10626983-B2 · Apr 21, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16H3/56?
- CPC F16H3/56 is the Cooperative Patent Classification code for “both central gears being sun gears.”
- How many patents are filed under CPC F16H3/56 (both central gears being sun gears)?
- Our database includes 43 publications tagged with this CPC code.
- Is patent activity under CPC F16H3/56 growing?
- Publication counts under this code: 3 in 2023 vs 1 in 2025 (latest complete years).