Electro-Rheological Fluid Composition and Cylinder Device
US-2022282179-A1 · Sep 8, 2022 · US
Electrorheological [ER] fluid dampers
Electrorheological [ER] fluid dampers · 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 | F16F9/532 |
| Official title | {Electrorheological [ER] fluid dampers} |
| Display label | Electrorheological [ER] fluid dampers |
| Total patents | 75 |
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 | 5 |
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 17 |
| 2021 | 9 |
| 2022 | 11 |
| 2023 | 10 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and system for quantifying dynamic response characteristics of a real-time damper
US-11422067-B2 · Aug 23, 2022 · US
Suspension control apparatus
US-11358432-B2 · Jun 14, 2022 · US
Systems and methods for additive manufacturing to encapsulate transformative colloidal suspensions
US-11339847-B2 · May 24, 2022 · US
Suspension control apparatus
US-11331973-B2 · May 17, 2022 · US
Cylinder device
US-2022106999-A1 · Apr 7, 2022 · US
Active damper for semiconductor metrology and inspection systems
US-11280381-B2 · Mar 22, 2022 · US
Suspension control apparatus
US-2022032720-A1 · Feb 3, 2022 · US
Variable stiffness bushing assembly
US-11215253-B2 · Jan 4, 2022 · US
Variable fluid damping
US-2021381575-A1 · Dec 9, 2021 · US
Suspension control device and electrorheological damper
US-2021354524-A1 · Nov 18, 2021 · US
Hydraulic fluid flow control
US-2021324881-A1 · Oct 21, 2021 · US
Cylinder apparatus
US-11143264-B2 · Oct 12, 2021 · US
Suspension control apparatus
US-11104198-B2 · Aug 31, 2021 · US
Cylinder apparatus
US-11073190-B2 · Jul 27, 2021 · US
Smart fluid damper
US-11015672-B2 · May 25, 2021 · US
Method and system for quantifying dynamic response characteristics of a real-time damper
US-2021033494-A1 · Feb 4, 2021 · US
Damper device
US-2021010560-A1 · Jan 14, 2021 · US
Suspension control apparatus
US-2020406699-A1 · Dec 31, 2020 · US
Control of real-time damper in a sprung mass system
US-2020386292-A1 · Dec 10, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16F9/532?
- CPC F16F9/532 is the Cooperative Patent Classification code for “Electrorheological [ER] fluid dampers.”
- How many patents are filed under CPC F16F9/532 (Electrorheological [ER] fluid dampers)?
- Our database includes 75 publications tagged with this CPC code.
- Is patent activity under CPC F16F9/532 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).