ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,245, issued on Jan. 13, was assigned to WALDEMAR LINK GmbH & Co. KG (Hamburg, Germany).

"Combination of augment and replacement piece for filling a bone defect" was invented by Helmut D. Link (Hamburg, Germany) and Gunnar Erb (Hamburg, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Graft for a bone defect, in particular a tibial head graft for a knee-joint endoprosthesis. It comprises a sleeve-like inner body (2) for implantation at one end of a long bone (99). An outer face of the inner body (2) is designed as a bone contact face (20) for bearing on the surrounding bone margin (97). According to the invention, an outer shell piece (3) is pr...