ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,387, issued on June 2, was assigned to Caterpillar Inc. (Peoria, Ill.).

"Power unit replacement system for a work machine" was invented by Jason Prakash Wigg (Ridgley, Australia), Christopher Douglas Carpenter (Plainfield, Ill.), Thomas Aldridge (Romaine, Australia), Rowan Terry Franks (Penguin, Australia), Travis C. Parker (Bloomington, Minn.), Matthew Thomas Hansen (Big Rock, Ill.) and Steven D. Springer (Naperville, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A machine may include a frame and a lift system. The lift system may include a lift arm attached to the frame. The lift arm may be configured to actuate between a raised position and ...