• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F16F - Springsshock-absorbersmeans for damping vibration
• F16F 9/20 - Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with the piston-rod extending through both ends of the cylinder

Patent holdings for IPC class F16F 9/20

Total number of patents in this class: 89

10-year publication summary

Principal owners for this class