Magnetic fluid seal device
US-9845889-B2 · Dec 19, 2017 · US
with two or more rows of balls
with two or more rows of balls · 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 | F16C19/08 |
| Official title | with two or more rows of balls |
| Display label | with two or more rows of balls |
| Total patents | 278 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 27 |
| 2016 | 16 |
| 2017 | 23 |
| 2018 | 17 |
| 2019 | 27 |
| 2020 | 34 |
| 2021 | 34 |
| 2022 | 28 |
| 2023 | 23 |
| 2024 | 25 |
| 2025 | 18 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hub unit bearing
US-9815328-B2 · Nov 14, 2017 · US
Pulley device
US-9810308-B2 · Nov 7, 2017 · US
Hub unit bearing
US-9796212-B2 · Oct 24, 2017 · US
Bearing arrangement for a deep drilling device
US-2017284469-A1 · Oct 5, 2017 · US
Steering Column Assemblies
US-2017261028-A1 · Sep 14, 2017 · US
Magnetic fluid sealing structure for high-speed rotation
US-2017248168-A1 · Aug 31, 2017 · US
Rolling bearing
US-2017211618-A1 · Jul 27, 2017 · US
Pulley device for chain or belt
US-9709154-B2 · Jul 18, 2017 · US
Tensioning roller or winder device and method of manufacture
US-9702399-B2 · Jul 11, 2017 · US
Damper and methods of making and using the same
US-2017191377-A1 · Jul 6, 2017 · US
Combined seal ring with encoder and rolling bearing unit with encoder
US-9695943-B2 · Jul 4, 2017 · US
Dual-type strain wave gearing
US-2017175869-A1 · Jun 22, 2017 · US
Ball bearing with integrated bushing
US-9581197-B2 · Feb 28, 2017 · US
Wheel bearing apparatus and its manufacturing method
US-9573419-B2 · Feb 21, 2017 · US
Large rolling bearing
US-9541126-B2 · Jan 10, 2017 · US
Double-row rolling bearing
US-9534633-B2 · Jan 3, 2017 · US
Lubrication for an expendable bearing
US-2016377121-A1 · Dec 29, 2016 · US
Rotor blade assembly with shim plate for mitigation pitch bearing loads
US-9523348-B2 · Dec 20, 2016 · US
Rolling bearing
US-2016363170-A1 · Dec 15, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16C19/08?
- CPC F16C19/08 is the Cooperative Patent Classification code for “with two or more rows of balls.”
- How many patents are filed under CPC F16C19/08 (with two or more rows of balls)?
- Our database includes 278 publications tagged with this CPC code.
- Is patent activity under CPC F16C19/08 growing?
- Publication counts under this code: 25 in 2024 vs 18 in 2025 (latest complete years).