ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,446,925, issued on Oct. 21, was assigned to Stryker European Operations Holdings LLC (Portage, Mich.).

"Orthopedic growing devices" was invented by Amir Ali Sharifi-Mehr (Bloomingdale, N.J.), Oliver Buchert (Franklin Lakes, N.J.), Andrew Poutiatine (Mill Valley, Calif.), Philip Harris Frank (Maplewood, N.J.) and Charles L. Bush Jr. (Wayne, N.J.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An expandable rod system includes a first rod portion having an internal cavity, a second rod portion sealingly positioned within the internal cavity of the first rod portion and moveable in a first axial direction relative to the first rod portion, and an osmotic ch...