• 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 2/39 - Rotary-piston machines or pumps having the characteristics covered by two or more of groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group and having a hinged member with vanes hinged to the inner as well as to the outer member

Patent holdings for IPC class F04C 2/39

Total number of patents in this class: 5

10-year publication summary

Principal owners for this class