ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,226, issued on June 3, was assigned to Whoop Inc. (Boston).

"Determining sleep need from physiological measurements" was invented by John Vincenzo Capodilupo (Boston), Behnoosh Tavakoli (Needham, Mass.) and Mostafa Ghannad-Rezaie (Malden, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Sleep need for a user is assessed using continuous physiological data from a wearable monitor. In particular, by calculating a first sleep debt metric based on user strain and a second sleep debt metric based on accumulated sleep debt, an objective metric can be obtained that estimates an amount of sleep needed by the user in a next sleep period. This approach tak...