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• F - Mechanical engineeringlightingheatingweaponsblasting
• F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquidsrotary-piston, or oscillating-piston, positive-displacement pumps
• F04C 18/20 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with dissimilar tooth forms

Patent holdings for IPC class F04C 18/20

Total number of patents in this class: 38

10-year publication summary

Principal owners for this class