ALEXANDRIA, Va., April 15 -- United States Patent no. 12,602,198, issued on April 14, was assigned to Amazon Technologies Inc. (Seattle).

"Search and knowledge base question answering for a voice user interface" was invented by Daniel Lewis Spector (Brookline, Mass.), Fergus O'Donoghue (Brookline, Mass.), Chase Wesley Brown Jr. (Boston), Shayne Leon Snow (Tyngsboro, Mass.), Brandon Gerald Li Horst (Arlington, Mass.) and William Folwell Barton (Concord, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A voice-controlled question answering system that is capable of answering questions using both a knowledge base and a search engine. The knowledge base is used to answer questions when answers to those quest...