ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,009, issued on May 26, was assigned to Aristocrat Technologies PTY Ltd. (North Ryde, Australia).

"Gaming device with transitioning trigger symbols mapped to progressively increasing credit values" was invented by Amy Batsiokis (North Ryde, Australia), Lagan Gupta (Delhi, India), Gaurav Goel (Uttar Pradesh, India), Vishal Singh (Uttar Pradesh, India), Dinh Tran (Wetherill Park, Australia), Nicholas O'Sullivan (Beacon Hill, Australia), Robbert Van Elven (Westleigh, Australia), Lauren Chapple (Huntleys Cove, Australia), Philip Seifert (Macquarie Park, Australia), Tyson Elliott (Bardwell Valley, Australia), Romit Aggarwal (Kellyville, Australia) and Sarah Boxall (Campbelltown, Australi...