ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,721,968, issued on Sept. 1, was assigned to Perfuze Ltd. (Galway, Ireland).

"High flexibility, kink resistant catheter shaft" was invented by John Logan (Plymouth, Minn.), Scott Arp (Miami) and Andrew H. Cragg (Edina, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for accessing tortuous vascular anatomy with a catheter having a distal tubular body that includes an inner tubular layer surrounding a central lumen, an outer tubular layer, and a helical support having adjacent loops spaced axially apart, and carried concentrically over the inner tubular layer and within the outer tubular layer. The distal end of the catheter forms corrugation...