ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,049, issued on Sept. 9, was assigned to Moharn Medical Devices LLC (New Orleans).

"Interbody fusion cages" was invented by Curt Freudenberger (Huntsville, Ala.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An implant for interbody fusion of vertebrae comprising a unibody cage structure having an enveloping cage volume and a minimized material volume. The cage structure comprises a first and a second generally planar ring member, each ring member formed from an opposing pair of lengthwise joists and an opposing pair of cross joists, the joists together forming a large opening through the ring member. The ring members are fixedly sandwiched on a plu...