ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,208,889, issued on Jan. 28, was assigned to Kopter Germany GmbH (Hoehenkirchen-Siegertsbrunn, Germany).
"Rotor system for an aircraft" was invented by Daniel Redmann (Grafing b. Muenchen, Germany), Nicolai Stadlmair (Munich) and Andreas Dummel (Hohenbrunn, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a rotor system for an aircraft including a rotor having multiple rotor blades disposed about an axis of rotation of the rotor substantially radially. A plane perpendicular to the axis of rotation, which extends through the rotor blades in a radial direction, forms a rotor plane. A rotor shroud surrounds the rotor circumferentially wit...