• All sections
• B - Performing operationstransporting
• B64C - Aeroplaneshelicopters
• B64C 27/57 - Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement characterised by the control initiating means, e.g. manually actuated automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust

Patent holdings for IPC class B64C 27/57

Total number of patents in this class: 313

10-year publication summary

Principal owners for this class