ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,237, issued on June 23, was assigned to MEDACTA INTERNATIONAL SA (Castel San Pietro, Switzerland).

"Expandable intervertebral cage" was invented by Francesco Siccardi (Castel San Pietro, Switzerland), Meinrad Fiechter (Castel San Pietro, Switzerland), Marco Riva (Castel San Pietro, Switzerland) and Samuele Meroni (Castel San Pietro, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "An expandable intervertebral cage includes a first plate and a second plate opposite to the first one. The cage further comprises a movement and adjustment mechanism of the two plates suitable to promote the relative mutual translation between the first and secon...