ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,485,614, issued on Dec. 2, was assigned to Stratasys Powder Production Ltd. (Nottingham, Great Britain).
"Apparatus for the manufacture of three-dimensional objects" was invented by Frederik Tjellesen (Cambridge, Great Britain) and Anders Hartmann (Cambridge, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stirring device for a powder tank of an apparatus for manufacturing a three-dimensional object. The stirring device is configured to rotate within the powder tank about an axis of rotation, and comprises a base plate and a strut. The strut extends from the base plate and is arranged to extend into the powder tank forming an obtuse angle ...