ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,939, issued on Oct. 21, was assigned to Caterpillar Inc. (Peoria, Ill.).

"Fuel admission tube for enhanced mixing in gaseous fuel engine and engine operating method" was invented by Bobby John (Peoria, Ill.), Jonathan W. Anders (Peoria, Ill.), Naga Krishna Chaitanya Kavuri (Melissa, Texas) and William Barnes (Rapid City, S.D.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An engine system includes an engine housing forming a plurality of intake ports, and a plurality of fuel admission tubes each forming a fuel passage and at least one mixing air opening fluidly connected to the fuel passage between a first tube end and a terminal end surface of a se...