ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,727,796, issued on Sept. 8, was assigned to Whoop Inc. (Boston).

"Tissue oxygen saturation detection and related apparatus and methods" was invented by Daniel Wiese (Cambridge, Mass.), Pamela G. Anderson (Boston) and Alessandro Babini (Cambridge, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wearable optical device is described for optically detecting parameters of interest within muscle, such as during physical activity or when at rest. The parameters of interest include oxygenation level and/or hemoglobin concentrations in some situations. The detected parameters, such as oxygenation level, may be used to assess physical performance, such as ...