ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,445,520, issued on Oct. 14, was assigned to Sonos Inc. (Santa Barbara, Calif.).
"Cloud queue tombstone" was invented by Arthur L. Coburn IV (Lexington, Mass.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Example techniques relate to cloud queue tombstones. An example implementation may involve a computing system receiving instructions to remove a particular media item from a playback queue. Based on the instructions, the computing system removes the particular media item from the playback queue and adds, to the playback queue, a tombstone indicator indicating that the particular media item has been removed from the playback queue. The computing system ...