ALEXANDRIA, Va., March 31 -- United States Patent no. 12,591,137, issued on March 31.

"Electronic devices with biased guide rails" was invented by Ivan S. Maric (Campbell, Calif.), Aidan N. Zimmerman (Poway, Calif.), Jason C. Sauers (Sunnyvale, Calif.), Jia Tao (San Jose, Calif.), John S. Camp (Los Gatos, Calif.), Phil M. Hobson (Menlo Park, Calif.), Jacob L. Smith (Austin, Texas) and Evan D. Christensen (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A head-mounted device may be provided with displays. The displays and lenses through which images on the displays are viewed may be mounted in optical modules. Positioners may be used to move the optical modules towards and away from each other...