• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; rotary-piston, or oscillating-piston, positive-displacement pumps
• F04C 18/16 - 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 helical teeth, e.g. chevron-shaped, screw type

Patent holdings for IPC class F04C 18/16

Total number of patents in this class: 1059

10-year publication summary

Principal owners for this class