ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,516, issued on March 25, was assigned to INTERBLOCK D.O.O. (Las Vegas).

"Automated ball exchange and selection for roulette game cycle optimization" was invented by Mirko Klanjscek (Ljubljana, Slovenia) and Peter Kroselj (Bled, Slovenia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A roulette machine having a launch device including an automatic ball-change device is described. The ball-change device includes a rotatable main wheel comprising a plurality of pockets, and a rotatable switch wheel switching between an open position and a closed position. The main wheel receives and stores a plurality of roulette balls for future use and facilitates c...