ALEXANDRIA, Va., July 3 -- United States Patent no. 12,346,373, issued on July 1, was assigned to Gracenote Inc. (New York).

"Multiple stage indexing of audio content" was invented by Peter C. DiMaria (Berkeley, Calif.), Markus K. Cremer (Orinda, Calif.), Barnabas Mink (San Francisco), Tanji Koshio (Emeryville, Calif.) and Kei Tsuji (Emeryville, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques of content unification are disclosed. In some example embodiments, a computer-implemented method comprises: determining clusters based a comparison of a plurality of audio content using a first matching criteria, each cluster of the plurality of clusters comprising at least two audio content from the pl...