Clutch device
US-2021310524-A1 · Oct 7, 2021 · US
Hub construction
Hub construction · 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 | F16D13/644 |
| Official title | {Hub construction} |
| Display label | Hub construction |
| Total patents | 82 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 13 |
| 2018 | 17 |
| 2019 | 10 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 10 |
| 2023 | 3 |
| 2024 | 5 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Disk, disk clutch with such a disk, double clutch device with such a disk clutch, and method for producing a disk
US-11047427-B2 · Jun 29, 2021 · US
Clutch carrier for a transmission
US-10982724-B2 · Apr 20, 2021 · US
Driveline component having rotatable shaft with centrifugal valve mounted thereto
US-10948028-B2 · Mar 16, 2021 · US
Clutch assembly
US-2021071720-A1 · Mar 11, 2021 · US
Transmission clutch with passive, speed-based fluid distribution
US-10830286-B2 · Nov 10, 2020 · US
Driveline Component Having Rotatable Shaft With Centrifugal Valve Mounted Thereto
US-2020325943-A1 · Oct 15, 2020 · US
Clutch friction plate and clutch device
US-2020191209-A1 · Jun 18, 2020 · US
Friction engagement device of automatic transmission
US-10655694-B2 · May 19, 2020 · US
Hydraulic power transmission device
US-10563706-B2 · Feb 18, 2020 · US
Transmission Clutch With Passive, Speed-Based Fluid Distribution
US-2020025264-A1 · Jan 23, 2020 · US
Clutch having a torque introduction part supported on the torque transmission part
US-2019381879-A1 · Dec 19, 2019 · US
Clutch disk with torsional angular-dependent friction damping device
US-10428876-B2 · Oct 1, 2019 · US
Brake clutch connection
US-10408279-B2 · Sep 10, 2019 · US
Transfer case with oil distribution
US-10363814-B2 · Jul 30, 2019 · US
Clutch carrier for a transmission
US-2019219106-A1 · Jul 18, 2019 · US
Zero backlash pre-damper to main damper attachment system
US-10337565-B2 · Jul 2, 2019 · US
Transfer case with oil distribution
US-10302186-B2 · May 28, 2019 · US
Clutch assembly for automatic transmission
US-10247256-B2 · Apr 2, 2019 · US
Automatic transmission
US-10180183-B2 · Jan 15, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F16D13/644?
- CPC F16D13/644 is the Cooperative Patent Classification code for “Hub construction.”
- How many patents are filed under CPC F16D13/644 (Hub construction)?
- Our database includes 82 publications tagged with this CPC code.
- Is patent activity under CPC F16D13/644 growing?
- Publication counts under this code: 5 in 2024 vs 3 in 2025 (latest complete years).