ALEXANDRIA, Va., June 2 -- United States Patent no. 12,642,550, issued on June 2, was assigned to The General Hospital Corp. (Boston).

"Method and apparatus for tissue grafting" was invented by Richard Rox Anderson (Boston), William A. Farinelli (Danvers, Mass.), Michael R. Hamblin (Revere, Mass.) and Dieter Manstein (Coral Gables, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Exemplary embodiments of apparatus and method for harvesting small portions of tissue ("micrografts") to form grafts can be provided. For example, a hollow tube can be inserted into tissue at a donor site, where a distal end of the hollow tube can have two or more points or extensions to facilitate separation of the micrografts f...