Two-stage servo valve
US-12448990-B2 · Oct 21, 2025 · US
of differential-piston type
of differential-piston type · 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 | F15B15/17 |
| Official title | of differential-piston type |
| Display label | of differential-piston type |
| Total patents | 27 |
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 | 3 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 4 |
| 2021 | 6 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Positioning valve control system
US-12092236-B2 · Sep 17, 2024 · US
Two-stage servo valve
US-2024209875-A1 · Jun 27, 2024 · US
Impact-resistant balanced hydro-cylinder with pressure relief and buffering protection
US-11913479-B2 · Feb 27, 2024 · US
Actuator for an aircraft landing gear assembly
US-11820495-B2 · Nov 21, 2023 · US
Positioning valve control system
US-2023323976-A1 · Oct 12, 2023 · US
Differential pressure motor and method for operating a differential pressure motor
US-11751899-B2 · Sep 12, 2023 · US
Pressurized gas engine and method of operating a pressurized gas engine
US-11751885-B2 · Sep 12, 2023 · US
Impact-resistant balanced hydro-cylinder with pressure relief and buffering protection
US-2022412380-A1 · Dec 29, 2022 · US
Device and method for ring gate closing optimization
US-11187251-B2 · Nov 30, 2021 · US
Actuator for an aircraft landing gear assembly
US-2021291966-A1 · Sep 23, 2021 · US
Piston assembly having reduced extend force and reduced displacement volume
US-11111936-B2 · Sep 7, 2021 · US
Pressurized gas engine and method of operating a pressurized gas engine
US-2021137548-A1 · May 13, 2021 · US
Pressure-compensated load transfer device
US-10982695-B2 · Apr 20, 2021 · US
Piston assembly having reduced extend force and reduced displacement volume
US-2021054931-A1 · Feb 25, 2021 · US
Device and Method for Ring Gate Closing Optimization
US-2020386247-A1 · Dec 10, 2020 · US
Differential pressure motor and method for operating a differential pressure motor
US-2020367922-A1 · Nov 26, 2020 · US
Automatic transmission
US-10746234-B2 · Aug 18, 2020 · US
Device and Method for Ring Gate Closing Optimization
US-2020102974-A1 · Apr 2, 2020 · US
Pressure-compensated load transfer device
US-2019145436-A1 · May 16, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F15B15/17?
- CPC F15B15/17 is the Cooperative Patent Classification code for “of differential-piston type.”
- How many patents are filed under CPC F15B15/17 (of differential-piston type)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC F15B15/17 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).