Patents Assigned to Plectrum Pty. Limited
  • Toy aircraft
    Patent number: 4335537
    Abstract: A toy aircraft having a rotatable wing assembly having at least two blades of aerofoil cross-section extending radially outwardly from the axis of rotation of the assembly, each blade having a zero pitch angle so that in operation the blades have a negative pitch angle relative to the airstream.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: June 22, 1982
    Assignee: Plectrum Pty. Limited
    Inventor: Terence J. Walker