ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,328, issued on May 5, was assigned to Lumenium LLC (Fredericksburg, Va.).

"Rotary machine" was invented by William Lukaczyk (Fredericksburg, Va.), William Anderson (Fredericksburg, Va.) and Riccardo Meldolesi (Shoreham-by-Sea, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure provides rotary machines that include, in one embodiment, a rotatable shaft defining a central axis A, the shaft having a first end and a second end. The shaft can have a first hub disposed thereon with a plurality of cavities. At least one contour is slidably received into an arcuate cavity in an exterior surface of the hub. The contour has a convex out...