ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,009, issued on Feb. 10, was assigned to Oura Health Oy (Oulu, Finland).

"Ring-shaped housing alignment features and fabrication techniques" was invented by Marko Uusitalo (Oulu, Finland) and Teemu Haverinen (Oulu, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods, systems, and devices for ring-shaped housing alignment features are described. The wearable ring device may include an inner shell and a printed circuit board. The inner shell may include a plurality of apertures, a first set of alignment features including planar regions that are formed into an arcuate ridge of the inner shell, and a second set of alignment features. The plur...